I disagree with this move because I am afraid that it will keep Joba in the pen for a long time. We don't need a guy with 3-4 plus plus pitches in the pen when he could be winning us 16-20 games a season potentially.
I think we have a lot of young arms in the minors that should at least be given the chance to show they can be effective in the pen.
Ross Ohlendorf
Kevin Whelan
Edwar Rameirez
Scott Patterson
Jonathan Albaladejo
Mark Melancon
Humberto Sanchez
David Robertson
Chris Britton
Brian Bruney
Jose Veras
Every one of these pitchers has either demonstrated significant success at the minor league level, or possesses remarkable "stuff". With a pool this deep to choose from, the smarter bet would be that at least two could contribute in some valuable manner in 2008, rather than that no legitimate major-league-caliber reliever will come from that crop this year. I don't recall any time in my years of Yankee fandom that there were so many high-upside power arms in the system.
Just grab a name off the top of the list - Ross Ohlendorff, c'mon down! Looking at his AAA statistics from 2007 wouldn't make him seem like a big-league relief prospect, but of course if you've seen him actually pitch in his late-season callup to the Bronx you couldn't be blamed for thinking otherwise - his mid-to-high 90s fastball with movement and good control sure looked major-league caliber to me.
But if Ohlendorf isn't up to the task, you move on to Kevin Whelan and his mid-90s fastball and impressive splitter and slider. Or Edwar Rameirez, with his outstanding changeup and otherworldly record of minor-league success. And so forth. Surely at least ONE of these talented pitchers will put things together in 2007, and given both the quantity and quality of the selection, I'd bet on more than one.
Robertson is a great example of just how stacked the Yankees' collection of pitchers is. Look at the numbers he put up last year as he blazed through Low-A Charleston, High-A Tampa, and AA-Trenton in his first professional season: 84 IP, 45 hits (no, that isn't a typo. Robertson gave up less than 5 H/9 IP while dominating three levels of minor league ball) and 113 K's (more than 12 per 9 innings). He has a mid-90s fastball and an explosive slider, just the kind of dominant "stuff" you want to see in your relief candidates.
And despite all of this, David Robertson arguably doesn't even crack a top-10 list of Yankees pitching prospects. I mean, forget about Jose Tabata and Austin Jackson! You can make a credible list of 10 Yankee pitching prospects without including David Robertson, even after his amazing 2007:
1) Joba Chamberlain
2) Alan Horne
3) Ian Kennedy
4) Mark Melancon
5) Humberto Sanchez
6) Kevin Whelan
7) Dellin Betances

George Kontos
9) Jeff Marquez
10) Dan McCutchen
Some people might argue to include Zach McAllister and Jairo Heredia on the list too, or even Andrew Brackman. Hey, did I forget JB Cox? You get the idea. This wealth of talent didn't wind up in the organization by accident and I think we'll all be pleasantly surprised when someone (or several someones) emerges and boosts the Yankees pen.