I don't do cisco's personally but on Sonicwalls and I think Netscreens theres an option for VPNS to be able to traverse to other VPN's its just a checkbox.
If that's not there, with 3 locations I don't think it would be too much to deploy 3 vpn connections so the people can get wherever they needed, for the sake of bandwidth/speed. You could also look at adding, omg the name escapes me, it's the file synch built into 2003+ and have a central sync location for all documents this would mean the corporate office would have a copy of all documents so the users don't need to vpn elsewhere. This also could simplify backup management at the same time. ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
