MyFitnessPal Version 2.0 - 2/28/13 (WP8 Only update, it seems, but I can't confirm.)
The update spruces up the interface, things seem to load quicker, and there are now live tiles that take
full advantage of small, medium, and wide tiles. (And are quite awesome, I might add.) Can pin just the app icon from the app list, which seems to do nothing, or pin a live tile of your daily summary from within the app, and apparently even pin a tile to quick-add meals or exercise. (I haven't found the option to pin that in the app yet, but it's in the screenshots on the marketplace. I'll find it soon.) Also, they added the friends feed!
Apparently there are still a ton of features not included in the WP version of the app, but this is the first update of the app since 2011 if I remember correctly. Hopefully they are going to add more in the near future.