Prism Solar, SensorLogic, Blacklight Power

• Prism Solar, which is developing solar concentrator technology, continues a drawn-out first round of funding with the announcement this week that a third investor, Rudd-Klein Alternative Energy Ventures, has signed onto the Series A round, contributing $500k.

• SensorLogic, which provides software solutions in the M2M communications space, added $4.67M to its own re-opened funding round (now totalling over $15M). The referencing article also has some interesting commentary on the M2M market.

• Blacklight Power, which has been getting some press lately, has apparently raised $50M. ...I'm not at all sure what to say about this, except to note that clean energy technologies continue to be hindered by the fact that the first question investors often have to ask themselves isn't "will the customers buy it" or "is it a compelling value proposition," but the even more basic "does it work?" Even if the answer is often "yes," it's one reason why it can be rewarding to focus on post-revenue investments in the space...