They are a UK dev so its probably release or submit on 31st March. If you check out the IPGN podcast (link), Paul from Tag says that the game should be out late March / early April, depending on App Store approval. He also reveals some interesting details about the game like the story, the amount of content available (inc. achievements, missions, vehicles, bonuses), the graphics (amount of 3d vs 2d and the overall style), the camera, the controls (uses virtual d pad), leaderboards/achievements, possibilities for the future (multiplayer) and the real-time play everyday game mechanic. Sounds awesome!
ohh, I didnt even think about it like that (I automatically assumed it was March 13)... oh well, I have a feeling it will be worth the wait
on their twitter site, tag have just put " the green light is lit, let the countdown commence" www.twitter.com/taggames