ESPN posted Keith Law's Top 100 Prospects of 2009 today. The first 25 are free; the other 75 are behind a paywall. (Anyone an ESPN Insider?)
There's also a list of Top 10 prospects by position. Yonder Alonso is #9 on the first baseman list. Todd Frazier is #10 in the third baseman list.
There's a rather short list for Cincinnati on the Top Prospects By Organization list:
1. Yonder Alonso, 1B
2. Drew Stubbs, CF
3. Todd Frazier, SS/3B
4. Neftali Soto, 3B
5. Chris Valaika, SS