as one of the 300, I have posted replies where I feel I am adding to the conversation, logged bugs when found, voted for things, and given feed-back on the apps I have used, i.e. done what was asked in return for the 6 month loan of the device.

Asking for general feed-back helps no-one, where-as specific questions that have NOT YET been asked or answered have always got a reply (at least from what i have seen on here).

In terms of battery life, my experience is that it is similar to my E90 (maybe slightly worse as the battery capacity is smaller). So with regular use, a day can easily be achieved, but large amounts of time with the screen lit, and all of the radios (WiFi, 3G, Bluetooth) on and in use (i.e. active conference use) gets you around 5 hours (so don't forget your charger).
Javascript heavy webpages (i.e. Facebook) seem to cause the CPU to be heavily used, so the batty life is majorly reduced then.

But the using the supplied charger, the battery reaches full very quickly (or at least that is my impression compared to my E90 experiences).