Following the other threads, it sounds like any RS-MMC card should work. No dual voltage, not MMCmobile (higher speed) needed.

I have a 512 MB RS-MMC card labelled TakeMS. it's the most simple version, I think, single voltage.

And I can't get it recognized. The 770 simply ignores it. It works fine in my Notebook (adding the adaptor to MMCfor the size, and entering it into a card reader). I -re-formated it to FAT32 - was not recognized. Re-formated to FAT - was not recognized.

So that card is still fine for ,my notebook, but not for the 770. Don't knowwhy, but when you look areound, there are many incompatbilities of memeory recorderdall around ...

I remember back in the summer, this question arose on the developer list, and it was asserted there that any manufacturer's card should work.

This literally is the first I've heard of one that doesn't work.

Maybe we should make a list of accessories -- keyboards, this MMC card, etc -- and Bluetooth phones that have been shown to be incompatible in the FAQ.