Overdue to provide an update on deals and such, but in the meantime I happened to run across this listing of venture capital and angels groups involved in cleantech... Three years ago. A nice, tidy, short list, huh?  Figured I'd rescue it from the memory hole, so I'll also cut and paste the list below. It would pretty much be impossible to do such a list today, when just about everyone at least SAYS they're investing in the sector now. The Energy Priorities list from November 11, 2005:

Firm	Focus	Web site
Angels with Attitude	See Soundpoint Ventures
@Ventures (part of CMGI)	2 clean tech investments; tech focus	www.ventures.com
Battery Ventures	2 energy investments; tech focus	www.battery.com
BASF Venture Capital	1 energy investment; materials, sciences	www.basf.de
BDC Venture Capital	5 energy investments; life sciences, technology	www.bdc.ca
Blackwolf Partners	New firm expects to make some alt energy investments	blackwolfventures.com
Braemar Energy Ventures	18 energy investments (4 current)	www.braemarenergy.com
Chrysalix Energy Management	7 energy investments; fuel cells	www.chrysalix.com
Draper Fisher Jurvetson	3 energy investments; tech focus; CalCEF partner	www.dfj.com/
Easenergy (part of EDF)	Makes non-cash energy investments	www.easenergy.com/
EnerTech Capital	20 energy investments; clean tech	www.enertechcapital.com
Expansion Capital Partners	1 energy investment; clean tech	www.expansioncapital.com
Firelake Capital Management	3 energy investments; energy & water focus	www.firelakecapital.com
Fort Washington	Manages state-owned New Mexico Co-Investment Partners	www.fortwashington.com
Frazier Technology Ventures	1 energy investment (Neah Power)	www.fraziertechnology.com
Hydro-Quebec CapiTech	21 energy investments	www.hqcapitech.com
Inverness Capital Partners	1 energy investment; industrial	www.invernesscap.com
Mohr Davidow Ventures	3 energy investments; materials, internet; life sciences, semiconductors	www.mdv.com
NGEN Partners	4 energy investments; materials, infotech	www.ngenpartners.com
Nth Power	20 energy investments; CalCEF partner	www.nthpower.com
OPG Ventures (Ontario)	10 energy investments	www.opg.com
Odyssey Venture Partners	1 energy investment; software	www.2odyssey.com
Pangaea Ventures	cleantech	pangaeaventures.com
RBC Technology Ventures	science, biotech	www.rbcroyalbank.com
RockPort Capital Partners	4 energy investments; materials	www.rockportcap.com
Rustic Canyon Ventures	software	www.rusticcanyon.com
SJF Ventures	1 energy investment; cleantech	www.sjfund.com
Sound Point Ventures	4 energy investments; sustainability	soundpointventures.com
Taproot Ventures	industrial, materials	www.taprootventures.com
Technology Partners	4 energy investments; life sciences, infotech	technologypartners.com
VantagePoint Venture Partners	IT & healthcare; CalCEF partner	www.vpvp.com
Yaletown Venture Partners	software, materials	www.yaletown.com
Yellowstone Capital	manufacturing, life sciences, interested in alternative energy	yellowstonecapital.com
Zero Stage Capital	1 energy investment; infotech, life sciences	www.zerostage.com