I think these icons need a bit more time.
It would be kind of odd to release 0.7 with the old icons and then a minor 0.7.1 or whatever with the new ones, though.
But I would go with waiting a while longer for the new icons. Do release Adblock Plus 0.7, though.
Then again, you said you're going to be away for two weeks...
(Five sentences, and I said just about "Yeah, wait.".