FWIW, as you are already aware, he's purposely avoiding you in an effort to not pay what is due.  You also possess the correspondence sent to him (faxes & emails), now is the time to send him some polite letters via Certified/Return Receipt asking for payment one last time.  He's had more than ample time to respond and/or pay since the end of August.  You may wish to consider a double-whammy of "small claims court" AND "contacting the bar" all with one cast of the stone.  Take ALL the correspondence (copy of emails / faxes / certified letters) and file the small claims suit.  Here's another link that may be of assistance:

http://www.georgia.gov/00/article/0,2086,5426814_39039081_39334516,00.html

With Regards...