My "London's Backyard" travel app for iThingies is now up on Android Marketplace as well. Check it out here.
AND NOW, February 2012, IT'S ALSO UP ON THE ANDROID ZOOM SITE, AT: http://www.androidzoom.com/android_applications/travel_and_local/londons-backyard-a-travel-gu_byaaf.html
Take a peek, then click on the "Screenshots" tab, and the "Download" tab as well.
It's huge, and it's only $2.99. One reviewer (on iTunes) called it "the best travel app ever."