The second I get a spec sheet I will update this post, for now we know that the E51 has a 2 megapixel camera, WiFi, FM radio and runs S60 3rd Edition Feature Pack 1. It appears to be available in 3 colors: silver, black and bronze/pink.
Update: I don’t see an application key, do you? Say hello to the home key!
Update: The spec sheet is live! 2 inch screen, 320 x 240 resolution with 16 million colors, quadband GSM and dualband 3.6 Mbit/s HSDPA (850/2100), WiFi (802.11g), microSDHC card slot, 1070 mAh battery, Bluetooth 2.0 + EDR + A2DP support and finally a weight of 100 grams at 114 x 46 x 12 mm.
Update: Here is a horribly blurry picture of the back of the silver version of the E51. New design pattern, ribbed for your pleasure. As a former E61i owner I can admit that your palm gets sweaty and that phone slips out of your hand faster than you can say iPhone due to the flat surface. I welcome this new texture: