It seems that $99 is one of the two magic price points of the holiday season (with $199 being the other one). The AT&T BlackBerry Curve 8520 ("coming soon"), HTC Droid Eris, and Apple iPhone fall into the $99 category, along with the Sprint's HTC Hero. Though the price remains at $179.99 on the carrier's website (after mail-in rebate), rumors are pointing to a price drop to $99 at Best Buy locations. Sure, you have to sign a two-year agreement, but for $99, it brings it down into the entry-level smartphone playing field.
With Verizon's HTC Droid Eris and Sprint's HTC Hero at the same price, it all boils down to carrier preference. Which do you prefer?