I wondered the same thing, but I gave my Droid X to my younger sister and now i have her Eris. (I had it when it first came out) so now I get to use her upgrade to get the Thunderbolt But man this thing is PAINFULLY slow! My GF also has an Eris, but hers is a BEAST. I kept the stock rom on it and flashed Conaps latest kernel and now she is running her Eris at 864Mhz ALL DAY LONG. Mine will only run at 768. Its nice to be back on this phone... really makes u appreciate the leaps and bounds that our phones have improved.... I cant wait for the TBOLT release day! Same processor that has already been overclocked (stable) to 1.42Ghz and an unlocked bootloader with 768MB of Ram AND 4G!?!?! Sign me up!