Ok, now that I can post URLs, here is Microsoft's Windows Mobile site,
http://www.microsoft.com/windowsmobile/default.mspx
And you can find Verizon's official ROM update at
http://support.vzw.com/phones/index.html?p=2200
It's the link at the bottom right hand side "XV6700 Windows Mobile® 5.0 Software Update"
Or you can download one of the many fine custom ROM's on PPCGeeks.com! Represent, lol