This guide is completely awesome. I used to speed up my tablet and a friend's, and it works beautifully. It's like I have a new tablet, and I didn't spend a dime. Those repos are full of good stuff, too.

The only things I did differently were these (hopefully they'll help someone out):

1) Make sure to delete all the images and sounds that come by default with the 2008HE image. That freed up enough space for me to complete the guide.
2) I used the desktop flasher tool to test and flash the 48mhz kernel instead of downloading the kernel and a flasher tool to my tablet, as described by Fanoush at the end of the section "Support for higher MMC 4.1 bus speeds for Nokia 770 (outdated, see SDHC kernel below)." I just found that to be more convenient.

Thanks again for the guide.