I didn't have to contact support. MagicalTux explained it on #mtgox today:
13:30 < jouke> Just received an answer on my ticket: "We were bound to certain
withdrawal limits per day which forces the requests to pile up
in long queue. We suggest you to cancel all your pending
withdrawal request and make a new combined single request. So
that it be processed faster."
13:32 <@MagicalTux> remember one thing
13:32 <@MagicalTux> if you did multiple requests, only one can be processed
every ~20 days
In short: Cancel all your tiny withdrawals and merge them into one. It will be processed much faster.
O.ô wtf ...
Okay thanks. I will wait and see I if I get sth. tomorrow.