Let's take a look at the players the Astros received from the Braves, shall we?
6'1" 200lb, 24-year old lefty CF from Hammond Indiana - 3rd Round pick by the Braves in 2005.
Schafer is the best-known quantity in the deal, hitting a homer in his first career AB off of - yes - Brett Myers. In 2009, Schafer hit .204/.313/.287 for the Braves, in 50 games, and was packed back to Triple-A Gwinnett. He did come back to the Braves, hitting .240/.307/.316 in 52 games in 2011. He's currently on the DL thanks to a fractured left middle finger.
6'2" 230lb LHP, 22-year old 8th Round pick in the 2008 draft by Atlanta.
Oberholtzer carries a career 25-20 record, with a 3.35 ERA / 1.16 WHIP, and a 3.79 K:BB ratio in the minors. He split time between Single-A Rome and High-A Myrtle Beach in 2010, going a combined 6-8 with a 3.78 ERA / 1.17 WHIP in 2010, and moved up to Double-A Mississippi in 2011, where he has thrown 127.2IP (still 8IP under his 2010 total), allowing 119H/53ER, 93K:42BB.
6'4" 180lb 23-year old RHP from Columbia, South Carolina, drafted in the 7th Round of the 2008 draft by Atlanta.
Clemens is also at Double-A Mississippi in 2011, where he has thrown 108.2IP, 103H/45ER, 93K:44BB for a 3.73 ERA / 1.35 WHIP. In 2010, he followed Oberholtzer's path (Rome/Myrtle Beach), and went a combined 2-4, with a 3.23 ERA / 1.37 WHIP, and a 2.25 K:BB ratio.
6'0" 180lb, 26-year old RHP from the Dominican Republic.
For Triple-A Gwinnett, Abreu has appeared solely in relief, posting a 2.25 ERA / 1.27 WHIP in 41 games. In 48IP, he has allowed 34H/12ER, 68K:27BB, and 5HR allowed. He missed all of 2007, but has the best numbers in his career coming out of Triple-A.