It's difficult to keep up with everything in the cleantech space right now.  Probably a good thing.  Here are some items to note:
- Renewable Ventures got sold to MuniMae.  It's a bit surprising, given that RV (mostly involved in solar project finance) had just finished arranging a $100mm pool of capital back in February.  Does this signify the potential beginnings of a period of fund acquisition in the cleantech space, as other investors look for ways to get a jump start on getting into the market?  RV continues to recruit and hire, by all reports, so they're clearly still planning to be very active.
- GridPoint announced a $16mm Series B, led by the Altira Group, and also including Contango Capital Management and Advantage Capital Partners, adding onto a large number of angel investors.  We've discussed the company's home energy storage/ management appliance in the past, when they raised $9mm back in November.
- Since about a dozen folks have forwarded around bits and pieces of the NYT special section on green business today, here's a handy link.
Other interesting tidbits:  
Sorry, Bob, "Enertech" is 
already taken.  But Bob Metcalfe's post is well worth checking out for his perspective on the possibility of an "energy bubble"...  Here's an 
interesting interview with a silly title...  
More evidence of large acquisitive players being active in the cleantech market...  
Here's a link to the pdf of E2's report on cleantech clusters (just for you, Matt Marshall)...  Lastly, 
a solar IPO you may not have heard of...