We are sad to say vela is retiring as a mentor. He's been a fantastic in homework help these past couple years! We thank him for all the effort he has given! We are happy to hear vela does however plan to stick around and continue helping students in the homework forums! We are pleased to announce that vela's replacement will be mfb. In a couple years mfb has quickly risen as PF's 2012 top newcomer and now will be the new homework help mentor. Congrats mfb!