I have another "problem" with the twitter plugin... It shows every contact i have as online, which is kind of misleading, because it is me actually who's online, not the contacts. I'd rather have no onlinestatus for twitter so the onlinestatus in the adressbook really means the contact is online...
I hope my description is not too weird, it's kinda hard to explain for me.
The second thing i'd really like to see is support for identi.ca which shouldn't be too hard as it uses nearly the same api as twitter...

Thanks for this very useful addition and i look forward to its future.