Some history relating to Cisco and T-mobile for those interested:
Cisco acquired linksys in March of 2003 - right around the time that T-mobile and Calypso were developing / testing / demonstrating the ASNAP technology on the T-mobile network using linksys routers.
So after looking at the technical history between these companies, you have to come to the conclusion that since Cisco owned Linksys during the trials with Calypso and T-mobile in 2005 and 2006, that they are also on the hook for infringment for the hotspot@home solution. They have also clearly been developing and implementing this technology into their products for the past several years.