Since the announcement of iOS 6 with UICollectionView Pete Steinberger has been beavering away on PSTCollectionView which is an iOS 4.3+, API compatible clone. Wonderful.
More on armv7s from Matt Galloway who has been hacking around to produce a small utility to fatten up your libraries with fake armv7s binaries. I would again echo his advice to use extreme caution using this in a shipping app but it still makes an interesting article.
A super easy build script for OpenSSL for iOS. If you need to ship OpenSSL I can't imagine there is an easier way to build it than this.