I don't have an "in" with the organization but will take a stab at your question.
Bucholtz - hurt off and on all year (mainly shoulder I think); pitched pretty well before latest injury; Stock the same.
Pence - I'm guessing he exceeded even the Astros expectations this season; Probably Stros #1 prospect as far as ceiling; Stock way the fuck up.
Anderson - Has played well...pretty much the same as last year, but at a higher level (now AA). Lotta speed, no pop if you go by the numbers; Stock the same.
Patton - Pitched extremely well 1st half, earing an invitation to the Futures game; was shelved for a couple weeks with tendinitis in shoulder I think; Pitched well afterwards but hasn't pitched past 3IP since; Stock way up.
Nieve - Pitched well enough to earn a promotion to AAA RR, and was fairly successfull there; recently lost for the season due to an appendectomy. Did as expected IMO; Stock up.
Einerston - played below expectations all year; ran into some personal problems causing him to miss few weeks of the season; Performed well below expectations based on last year's numbers, but this was expected if you're an OWA member due to Jacksonian's "in" during the offseason; Stock down.
Jimerson - Same story. Big time talent...big time strike out numbers; Stock the same.
Pluta - Extremely wild, but at least he's healthy. No where to go but up after Tommy John surgery, so; Stock up.
Others with a "Stock up"
Zobrist, Gutierrez, Barthmeier, Hirsh, Sutil
"Stock down"
Albers (personal problems, but has rebounded in last month), Whiteman, Gothreaux (shoulder problems?)
There you go...Jacksonian's you're man though...he'll probably correct half the shit I've said so walk softly with the information I've given you.