Heh, I just switched to Amazing Weather after using Weather Flow for a long time, and now with the new update I'm back to Weather Flow. The upgraded HD tile is nice, plus I like the way Weather Flow shows information via the live tile, now we've got weather getting dynamically updated from the lock screen. Cool stuff. There's some seriously interesting things that some developers can do with the lockscreen. Another I saw recently was Hello Friends, an app that gives you the option of a lockscreen populated by your contact list pictures, which it updates periodically.
Going to be interesting what sort of apps show up once more and more apps are updated and created using the new APIs. And just to keep the tone of the thread lately thematically apt, stupid Microsoft releasing the latest SDK so late, so many low res, WP7 apps that make for a really bad first impression. They should have been ready and released it months in advance.
Humbug!