Speedstep just throttles down the CPU under certain circumstances, to reduce power consumption etc... could help battery life, I seem to get around 4 hrs under OSX and 5-6 under XP, with no tweaks. No I thought you had that installed that already with the installer, so it thought DISABLING it might change the trackpad behavior, but I doubt enabling it would help. I don't really know what kexts are involved. I know there's 2 elements about speedstep in the installer... one adds a little program to see CPU temperature. But it shows 2 cpus, even though Atom is a single core. So I put cpus=1 and now the little app still sees 2 cpus, but one has ridiculous values and one lists the real values. I think maybe even I did a cpus=1 at boot before installing Iatkos and the behavior in the app remains the same. Whatever.

I can't help about the realtek really. I know the wired ethernet may work but is not so stable, depending on the chip. I don't use it. My wifi was also detected properly in the System profiler, mine is Atheros 5007 if I remember, but it just wouldn't work. I know some chips do work, and if you make it work post your method. I know my atheros is useless for this, even though it worked great under xp. The replacement wifi, great if you can find it cheaper, and yes it took about 20 days from HK, i just wanted to state the bcm94321mc works out of the box for me without driver. Other chips work too, I think one can refer to this, in the hardware compatibility section :

http://wiki.osx86project.org/wiki/index.php/Main_Page

or on the Iatkos for recommended netbooks infos...

http://iatkos.wikidot.com/recommended-osx86-netbooks