I believe that the New Testament era began at the cross. The period between the cross/resurrection and Pentecost must be included in the New Testament era (70th week), EVEN THOUGH Pentecost "officially" launched the New Testament "church age". ( Remember how that we learned that the Old Testament sabbath was changed to the New Testament Sunday "sabbath" in reading about that first Sunday when Mary Magdalene went to the sepulchre? This was BEFORE Pentecost ... yet obviously STILL on the New Testament side of the cross).
The Lord's Baptism and His earthly ministry is NOT included within the New Testament era. The Cross is the one GRAND event which separates the Old and New Testament eras ... the veil of the temple was rent in two, from top to bottom, as a testament to this truth.
Jim, the 69 "weeks" were on the Old Testament side of the cross ... when God was dealing in types, shadows, figures, etc. I don't know of anyone who believes the entire 70th week to be literal in nature ... HOW CAN IT BE??? Also, as Harold Camping says in his pamphlet ("The Seventy Weeks of Daniel Nine"), "It is the prerogative of God to use numbers as he desires". 
Hey Dean,
Here's some earlier comments from Kohathe in this thread:
From reply #9, "I have always agreed that the covenant week began at the time Christ was baptized. That was when Christ was announced the Lamb of God, that was when Christ began his early ministry and proclaimed the acceptable year of the Lord. Therefore the sacrifice and oblation ceased at the cross when the veiled of the temple rent in two because Christ came as the sacrificial Lamb who whose sacrifice was once and for all and ended all sacrifices."
From reply #20, "My question then to Erik or who would want to respond. What do you do with the 3 1/2 years between the end of the 69th week and the cross? Do we just skip that and start the covenant week at the cross? The 70 weeks should be consecutive, since there was no break going from the 7 weeks to the 62 week, why would there be a break from the 69 week to the cross? I hope Im making this clear. And it's interesting that the time span between the end of 69th week and the cross is exactly 3 1/2 years or the middle of one week."
From reply #26, "...Christ's ministry on earth has to be included in the covenant week. We know that Christ selected the 12 disciples, and saved a number of people BEFORE the cross, if it weren't for this part of Christ's ministry there would be no church... The people who became saved during His ministry also make up the "holy city" so we can't cut that off and begin a covenant week at the cross without including this time period."
From #46, "I did a little searching last night and discovered two verses that might help. Romans 15:8 (beginning of covenant week) and, and 1Corinthians 1:8 (end of covenant week)"
Quite a bit of time was used in this thread to point out that "covenant" and "testament" are interchangeable words. In trying to make this point, the discussion got tedious at times but some of us may have concluded that God would have us look at the word "covenant", as translated from the Hebrew, as "testament" in Daniel 9:27..."He will confirm the testament..." And the question still remains, How can you have His testament without His testimony? His very presence confirms The Promise in part, no? From about #66 we get into the distinction between The Promise/New Testament and the Old Covenant -- interesting to note that the New Testament is actually older than The Old Testament.
Also, if all of the other weeks are calculated to be literal periods of time, why isn't the 70th week of Daniel 9 also literal? Once we understand that the 1,000 years of Revelation 20 are not included in Daniel 9:27, things begin to clear up...hopefully

Revelation 20:1-3 And I saw an angel come down from heaven, having the key of the bottomless pit and a great chain in his hand. And he laid hold on the dragon, that old serpent, which is the Devil, and Satan, and bound him a thousand years, And cast him into the bottomless pit, and shut him up, and set a seal upon him, that he should deceive the nations no more, till the thousand years should be fulfilled: and after that he must be loosed a little season.
Let me include it in Daniel 9:27 for your interest:
And He shall confirm the covenant with many for one week: and in the midst of the week He shall cause the sacrifice and the oblation to cease. And I saw an angel come down from heaven, having the key of the bottomless pit and a great chain in his hand. And he laid hold on the dragon, that old serpent, which is the Devil, and Satan, and bound him a thousand years, And cast him into the bottomless pit, and shut him up, and set a seal upon him, that he should deceive the nations no more, till the thousand years should be fulfilled: and after that he must be loosed a little season. And for the overspreading of abominations He shall make it desolate, even until the consummation, and that determined shall be poured upon the desolate.
Jim