I've been keeping an eye on del.icio.us for while now but I never actually gave it a try. Today I decided to get an account but... it turns out they have disabled their import feature:
"Our import feature has been turned off for a few days while we fix some bugs. Sorry!"
There is no way I am going to attempt to get my huge list of bookmarks in del.icio.us, unless they have some decent import capability.