Looks like Net10 has some good deals on their site at the moment. Besides putting online pages for the LG and Motorola phones that Tracfone will soon get (good) and taking away the 1-year card (bad) Net10 has made available some sweet specials that may well make it a nice carrier for a person who is on the upper end of minute use for prepaid...
Here are the good deals (all of them come preloaded with 300 minutes and 60 days of service):
Nokia 1100 (refurbsished) - $20
Nokia 1600 (refurbished, color phone) - $30
Motorola v171 (refurbished) - $40
Motorola c139 (new, blech) - $40
Motorola c155 (new) - $40
Everything else isn't a particularly good deal, costing $80 (Motorola v171, v170) or $90 (Motorola c261, v176) but the other phones are nice buys if you just want to talk and text...