On Tuesday, Carl T. Delfeld at Seeking Alpha told us about the new kid on the cleantech ETF block, the PowerShares Global Clean Energy ETF (AMEX:PBD). For more details, check out Powershares section on PBD. This fund tracks the WilderHill New Energy Global Innovation Index – an index put together by New Energy Finance (NEF) of London. NEF is, in my opinion, one of the most interesting organizations in the clantech finance space at the moment. On Tuesday, Jack Uldrich at The Motley Fool reminded us that a bill is just a bill. At AltEnergyStocks.com, we view cleantech in a similar light; although there may be some bumps along the way, it is highly unlikely that anything will permanently stall the juggernaut at this stage. On Wednesday, Mark Gongloff at the WSJ’s Energy Roundup gave us the views of various pundits on where cleantech stocks stand in the context of the current market correction. Is the glass half full or half empty? If you have been cautious and have been amassing cash for the past little while, than none of this is so bad. On Wednesday, WattHead added a touch of humor to to the Cape Wind debate. Cape Wind aside, offshore wind is an interesting emerging area. Over the past month, some sizable money has gone toward offshore wind in Europe. On Wednesday, David Roberts at Gritsmill outlined, for us, what makes a good cap-and-trade system. As we’ve discussed in the past, for emissions trading to achieve most of its goals, politicians must resist certain temptations that politicians are generally unable to resist. On Thursday, Biopact informed us that cellulosic biofuels may already be cost-competitive. Many observers agree that the future of biofuels lays with cellulosic, and the biggest hurdle to date has been cost.