The beauty of the built-in IM service, from my point of view anyway, is that it collates all my contacts, no matter what service they are using. It would be nice to have similar location information provision so that whichever service my friends are using, they can see where I am.

Anyway, we live in hope that the new location framework will provide some cool features, otherwise I'll have to pull my finger out and try to hook some of these bits together myself (or poke Nokians to open enough up to let us do so).