@NickT since you're an active chem.SE member, and you have zero questions, I'm going to blatantly shove this in your face:
meta.chemistry.stackexchange.com/questions/72/… :P .
Please, can we get our question-asking rate up? (Sorry if contacting you this way offended you, but it seems that nobody's reading meta and there's no way to get the message across :/. Saw your gravatar, thought it was worth a shot)