I recently decided to expand my mobile experience horizon and acquired a Window Phone 7 from Brian Henderson, who I met a few years ago at the Seattle Alt.NET conference. Brian got the phone from this year Microsoft PDC and it is a LG Optimus 7 (a.k.a. LG-E900 outside North America). Having spent about four days with it, here is my raw first impression.
Disclaimer: This is not intended to be a hardware or software review. For that you can find them on the web easily. Here I would just point out things that stick out to me, especially comparing against the iPhone 4/iOS.