Divineo USA have posted news that they have the NeoMax 1G and 8G on sale, heres more info about Flash Cart:
Neo Max is the ultimate pack for your Nintendo DS. It can be used for development, to run backups and homebrew on GBA and on Nintendo DS. It has a fast and convenient transfer/burning option. You can run application through the 256M of the card and more! A 1G SD card is INCLUDED that can be managed like a virtual hard disk for your NDS!