Increasingly the E61 seems to be attracting the attention of both Blackberry owners who are looking to do a bit more with their phone (but want to retain Blackberry push email servicies) and PDAphone (Windows Mobile / Palm) users who want to try something new. The E61 has a very impressive technical feature set when compared with some its rivals combining GSM, WCDMA, GPRS, EDGE, WiFi, Bluetooth, IR, and USB in one package. Those used to one handed, voice-centric smartphone may not be so enchanted with the E61 and may be better off looking at devices such as the N80 or N71.
You can read AAS' review of the E61 here.