Just curious. I have my own ROM that I've tweaked and tweaked, then tweaked some more. Its ESE53, using my own kernel compiled from latest 2.6.29 source, with wifi tethering and at 600mhz, stock voltages. Only other thing that is somewhat less than stock is it uses Helix instead of the stock launcher (which isn't even on the ROM). it has some other niceties too; I'll post more if people are interested.
I'll post it as an update.zip, if anyone is interested.