Below are some helpful reference links for Treo Smartphone support.
Treo 650 Smartphone User Manual (pdf):
http://www.palm.com/us/support/handbooks/treo/treo650gsm_UG.pdf
Treo Downloads:
http://www.palm.com/us/support/downloads/
Everything Treo Site:
http://www.everythingtreo.com/
VersaMail User Guide (pdf):
http://www.palm.com/us/support/handbooks/treo/Treo650_VersaMail_UG.pdf