* X11 is working quite nicely. 480x640 resolution is best for using E17.
* I'm trying to think up a solution for the 3D accelerator. LLVMpipe works but it's not much faster than classic Mesa. Maybe that's because I'm only testing performance with Mupen64Plus and SuperTux :P Ideally we would have an open-source OpenGL ES 1.0 driver with an OpenGL 1.3 wrapper/Gallium state tracker, but unfortunately Qualcomm closed it :(
* The hardware buttons don't generate input events (except the power button, which apparently makes SDL windows fullscreen).
* USB function ether works. This means you can SSH into it or update packages without a data connection (I don't think data even works).
* Sound doesn't work because Android doesn't use ALSA - or maybe because DZO hasn't written the proper driver...
* Camera(s) would need a Video4Linux driver; again, not my area :P
* Bluetooth is untested.
* GPS needs userspace work (gpsd?) - maybe the HTC Dream page at HTC-Linux.org has info...
* Calling - untested because: 1) I doesn't got the software, and 2) even if it worked, I have no one to call :P
If you're willing to wait indefinitely for those things to be fixed (or if you don't care), all you need is a Debian chroot on an EXT2-formatted SD card and my special NBH. The NAND should also work*, but Debian probably wouldn't fit on it. These instructions should also work for Ubuntu, Gentoo, FSO/OpenMoko, Angstrom, ARMedSlack, Fedora, or what have you - the only requirements are ARMv6 or lower and a semi-standard root filesystem layout (i.e. /sbin/init).
For those of you who don't trust binaries, I've uploaded my patches to the kernel and tinboot needed for Debian to boot. For everyone else, I have NBH files ready. Just flash the NBH, insert your SD card, and it should boot.
*LogFS patch included and enabled in my NBH.