The second chemistry@nature podcast of 2009 is freshly minted and ready to download! You can also find it on iTunes, if that's how you get your ChemPod fix.

Brian Shoichet from UCSF tells us how to use computer modelling to speed up the screening process for new drugs. Nature News' Katharine Sanderson talks us through a very cool sounding tiny DNA machine that can measure the pH inside cells, and our very own Catherine Goodman reports on the recent ACS meeting.

But that's not all - Stu pops up at the end to introduce a Nature Chemistry competition. This time we're giving away goodie bags filled with posters, lab coats, t-shirts, yo-yos, etc - and even copies of the first issue. All you have to do is email your best chemistry limerick to podcast@nature.com - the best five will get the goodies!

Happy listening.

Neil

Neil Withers (Associate Editor, Nature Chemistry)