Apple raises 3G App download cap from 20mb to 50mb across all iOS devices effective right now. This is a big win for us, that 20mb limit costs a huge number of sales on large apps, customers just don't bother to try and buy it again later on wifi.

http://www.macrumors.com/2012/03/07/apple-boosts-over-the-air-app-store-download-limits-to-50-mb/

-Brad