Can anyone explain to me what the difference is between SD (Secure Digital) and MMC (MultiMedia Card) is?

Is there any difference in usage? performance? rewriteablility?

Checkout this article:

http://www.pocketpcdubai.com/ppcstorage.html

Mohd, thanks for the link. that was very useful. If I can, I'd like to add this link to the topic in case anyone else is interested, because it's a simple breakdown of the 2 technologies. This was linked from the page you added above, so I hope it's not a problem.

http://flash.atpinc.com/articles/view.php?article_id=1008

Thanks again.

Thats good, thanks