I work at Sprints business office in MI. All I do is play with these phones all day long. This is what my Palm rep told me on her last visit. She said Sprint will be the only carrier with the treo 650 for 4-6 months.
I'm not sure if this is old news or not, but I was recently told by a Verizon rep in NH that the Treo 650 would be available through the carrier in May 2005. The timeline would coincide with the 6 month exclusive Sprint deal that I believe began in November 2004.