Might be something to keep an eye on. If IBM figures out a good balance on equipment and others follow, perhaps the increased demand will lower the price for the rest of us. Layer 8: IBM illuminates solar power system aimed at data centers
Soalr is definitely the way to go for power augmentation - LOTS of roof top acreage out there! I believe all new State and commercial building plans should incorporate something similar - it could power the lights, scecurity systems, and more depending on efficiencies.