Just a quick heads-up: the iPhone DevTeam has updated redsn0w to v0.9.10b5c to fix some issues with the iPhone 3G and 3Gs and prevents redsn0w from crashing due to the ever-growing ramdisk size.
Here are the redsn0w download links:
- redsn0w 0.9.10b5c for OS X
- redsn0w 0.9.10b5c for Windows (be sure to run in Administrator mode)