Yeah, we have the same issue with laptops. Most staff here (say 20-30 have laptops, each chews TWO IP addresses as they wander from cabled to wireless connections.)

Most users run both at the same time, although I guess only the first "active" connection is the one used for routing. Still though, we are using a lot of extra IP addresses we don't need to... But this is difficult to solve on our side if we need to maintain conveniance for end-users.

__________________
Simon Shaw
Systems Manager
Micromine PL

2xDell R210 Servers in failover config.
http://www.sputcorp.com/