I just found these so far:
Edit: WAAA THERES A GINGERBREAD IMAGE!!!!
Edit2: I examined update.img from sdrecovery via mount -o loop.
-> SD recovery definitely won't recover full system, but restore mmcblk2p9 and mmcblk2p10 from images only.
it seems that you can boot a completly working Android image from SD Card!
So, i case you break something, you can recover - provided that you have backups of partition table, etc
To dump whole bootarea inkl. MBR:
[root (ttyGS0)]# dd if=/dev/mmcblk2 of=boot.bin bs=32768 count=800
Yay, and if you download the IMX_MFG_TOOL from Freescale, you'll get lotta tools to flash / create sd recovery image, etc....