I bought a 1gig sandisk from buy.com for $79.95 and a sandisk usb sd,mini sd, mmc, rs mmc, transflash card reader/writer for $13. It's working great. I wanted to store some pdf on there....pdf reader is a big disappointment. My nokia 9290 does pdf much better than the 770. At this rate I don't think I'll be using the pdf reader.

The weird thing is that I'm having problems reading the 64 meg nokia card that came with the 770. The nokia card have 2 rows of contatcs on it and my rs-mmc that I bought only have one. My regular mmc card on my phones have 1 row of contacts also. I have no problems with them. The 64meg mmc that came with the nokia keeps on disappearing and reappearing and I have problem opening it from my memory card reader. It doesn't have any problem on the 770. Keeps telling me it's corrupted. Is this mmc-mobile or rs-mmc? Aren't they backward compatible?