7100g

According to this post on Engadget, the more phone-looking RIM 7100 series phone is supposed to be coming to Cingular at the end of the month.  Here's a picture:

This is certainly a Treo 650 competitor and looks like it's going to come to market faster than the GSM version of the Treo 650; we'll have to wait and see what if the price point winds up being as low as the $199 price for the device on T-Mobile.  This is a quad-band GSM phone, so it will allow world travel and with the lack of a Blackberry client on the Treo 650, this may be a better choice if your company is stuck using a Blackberry Server and will not enable POP, Outlook Web Access, IMAP, and is not planning to use an Exchange 2003 server to provide ActiveSync support.