Here is a list of one's we're watching. We need to fill in the "why", and add the "Movies" from other posters (could they contribute?) 

ASTI = Ascent Solar

SPWR = SunPower

PVC = PV Crystalox Solar PLC

CSUN = China Sunergy: Zhang, Pres, did lab work in New Zealand, currently producing approx 100MW/yr, huge market cap (approx $6B), huge expansion plans, backing of chinese gov't, market darling, a leader.

STP = Suntech Power

nanosolar, should have IPO in next year, probably set to be world's largests producer this year or next, roll-fed continuous process

Here at Seeking Alpha website is a quick guide to solar stocks.  Got other guides anyone?