Looks like you were posting about the same idea while I was.
Before I ported from VZ to CC, T-Mobile told me they could port in a few days, but I didn't know if that was true.
If they can now do that from CC, I guess I'm in, absent any other known option.
Update: from their web site, it looks like prepaid T-Mobile may not have call forwarding.
Further update: Definitely doesn't have:
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support.t-mobile.com/thr ··· ad/33237said by nitzan:If you can't find a VOIP provider that will port it within a few days, your best bet is someone like T-mobile prepaid. It doesn't cost much and they're very fast on porting. You could always port it out to a VOIP provider later if you wish.