I'll post the code if you promise not to laugh. When I'm in the R&D phase my goal is to understand, not to write pretty code. All I'm doing right now is building a reference for dealing with the MMC when I make a final application.

I'm at work (work has nothing to do with PICs) and the files are at home. No internet at home (yes, I live in a cave... next-door to Osama) so it will be a day or two before I get it up. Most likely I'll have the code faster by then as tonight I'll probably change it to write the page buffer on the I2C memory. I started with the recommended 10ms delay after a write and once things were stable, I moved it to 5ms. Next step will be polling for busy for the shortest delays.