First off, STi's web access, according to an actual user haydeno (HowardForums) is actually 17 cents a minute, not 19. I'll take that extra 60 or so cents a month, which brings the price down to the $4.75-$5.25 range depending on whether it's February 2005 or October...
Second, Wal-Mart has really cheap prices on phones, even with tax! The Virgin Mobile Audiovox Snapper (8915 really) is, along with the V7 Flasher (8910), $97.66 at my local Wal-Mart, a full FIFTY DOLLARS cheaper than Virgin Mobile sells it for online, and about 40 dollars cheaper with tax included at Wal-Mart. Also, if you're in an area without SingleRate Tracfones (Nokia 1100, Nokia 2600, Motorola c155, Motorola v170) at least, and possibly in other areas, you can get the new Nokia 2126 "Color Shorty" on their CDMA service for $19.88 or thereabouts, really really nice for a small, color phone that may be able, through *228 and hitting option 2 if you're on Verizon, to have the coverage of the largest home and roaming network in the US! :)
Third, Cingular has the excellent Nokia 3120 on sale as a GoPhone package for $29.99, including a $10 activation credit for their prepaid service. I'm pretty sure shipping is free. Nokia phones are easily unlockable, so this just might become my next T-Mobile To Go phone (instead of the Cingular Nokia 6010 given to me, or maybe I'll keep it).