Interesting tidbit: it's taken us months to get approved for the App Store b/c we were a bit stubborn in our refusal to offer an audio-only version of Sal's videos to people w/ crappy cell connections.

Since his stuff is so low-bitrate, we thought we could get all videos down to the lowest of Apple's HTTP Live Streaming requirements -- even having the crappiest of crappy video is 1000x better than audio only when trying to learn algebra.

We were able to make a <64kbps version for most of the videos, but couldn't do it for everything. Some were just over the mark. We hoped for a little app store leniency given the content.

Eventually we had to give up on some problematic videos and offer audio-only versions for crappy streaming connections. Gotta ship.