The Open Laboratory third annual compendium of the best science blogging is now for sale at Lulu.com. In it you can find 52 wonderful entries, including one by me. I can't wait to read some of the great stuff that I missed when it first came out - and having a dead tree copy will enable me to take my favorite bloggers with me even when I'm away from the computer. Proceeds from sales of the book go to supporting next year's ScienceOnline conference. So even though you can read all of the entries for free on the internet, if you've got $7.50 (pdf) or $15.50 (paper) burning a hole in your pocket…