Social bookmarking

I'm in a quandary.. I have social bookmarking overload! Thanks to Yani at NET11, I have become hooked (finally) on del.icio.us but Greg had to go and push ma.gnolia at us! :)

So for the moment I am using both, but it is highly impractical. I'm tossing up the idea of going back to one (but which one!) or using both for different contexts of links - for example, one for uni links, one for fun links.

Decisions, decisions!