Baseball America put out their 2012 Top 100 Prospect list today, and three Astros farmhands made the cut.
http://www.baseballamerica.com/today/prospects/rankings/top-100-prospects/2012/2612998.html
Jonathan Singleton, #34Jarred Cosart, #50George Springer, #59
Not too shabby.
On the subject of Top Prospect lists, John Sickels at Minor League Ball put up his Top 120 Prospects List this morning. It's worth a look.
http://mobile.minorleagueball.com/2012/2/24/2821479/minor-league-ball-baseball-top-120-prospects-for-2012