I just got my Ocean today, and my girlfriend's will be arriving middle of next week. I don't expect any 160MB limit to be a problem. We're approaching this from the perspective that the Ocean is an awesome phone, and happens to have some neat online features. But any media (music, pictures, video) that gets played on our phones will have come from my computer, so the total monthly bandwidth usage will probably be half the limit, or less.

Ocean = sexy phone with awesome IM and email capabilities, and decent PMP (mmm, bluetooth MP3 and AAC transmission to bluetooth-equipped car stereo)