Same issue here. Don't you just love when people do this and don't elaborate?
The email about my W-9 implies that the gig will be published automatically once they've reviewed my W-9, and trying to publish my gig by hitting next on all the gig creation steps but once I GET to the W-9 step, which still has all the info I filled out saved on there, and try to click next, it just keeps taking me back to the start of the W-9 step. Very cool UI, very good.