This is pretty cool! Maybe it has been out there for ages, i?m not sure, but i?ve just realised that you can sign into Live Messenger from multiple locations.
The site below has more info:
This makes much more sense for example I could be online at home (as I leave my PC on all the time, but actually be out and about with my Netbook (Samsung NC10) or on my mobile (Samsung i780). This way I don?t get home to lots of missed conversations!