I have had my Nokia 710 for almost a month now and I love it! A guy at work has the Radar and I really like that one too. When I was at T-Mobile deciding which one to buy, it came down to price. The Nokia was free and the Radar was $149. I went with free and I am not disappointed!
Don't hold back from Windows Phone just because you wanna wait for something new. iPhone is constantly changing also and, in my opinion, worse than Windows Phone. The newest one out, Lumia 900, is a freaking awesome phone.
I posted this in another thread also, but I see that SkyDrive app only works with one user per PC. I have two user profiles mine and my wifes and I can only get Skydrive to work on my user profile.
I've also noticed that SkyDrive app for PC can not work with mulitple users on the same PC. It will work with 1 user. Unless I'm missing something. When I installed the app to my PC I can access it and sign in, but my wife's side of the PC doesn't even have the program installed.
I've left mine off for the most part and only turn it on when I want to use that feature. I get a ton of phone calls all day long, and wth it on my battery does drain a little faster than normal. And with all services using that features turned off as well.
The multi-tasking is the on part I would NOT be looking forward too. I came from Android (who really suck at the multi-tasking I might add) which had horrible battery life with multi tasking. I'm happy that my phone will be at 1/2 charge when I get home after 8-10 hours with moderate use.
As far as the looks go on the pic I don't like it. I like a really clean look. But as was mentioned, since dell is getting out of smartphones, not likely to ever happen anyway.