With the latest changes in driver for Sentelic touchpad I’m eventually able to use two-finger scrolling, and disable touchpad while typing.
Middle-button emulation and on pad click & drag doesn’t work yet, though. Edge scrolling either.
Anyway it starts to be really usable and there is some progress to merge this driver with mainline kernel.
I believe last time I was compiling kernel was around 2.4.18 and only because at that time I was maintaining router for some network and needed some special iptables extensions. Happily it hasn’t changed too much since then and I can compile 3.2.1 without problem 
What’s the status of this patch? It doesn’t seem to have been accepted upstream yet.
We’ll need to backport this to 3.2 for wheezy, but I would like to use a version that’s been reviewed and accepted.
Well AFAIK author is going to contact LKML after fixing also edge-scrolling which doesn’t work yet.
So I’m not sure when it’s going to happen.