I can share a precompiled binary, but installing it is a bit tricky. Maybe fanoush can add two versions of cx3110x.ko to the memory corruption bugfix installer, with the option to choose between normal and highspeed version. On the other hand, I have some more patches added, one of them retries waking up wlan chip if the first attempt failed (standard driver just sets internal error flag and stops working properly if such error occurs). From the user's point of view, it looks like a sudden loss of connection while wlan indicator shows that it is still online, this problem disappears after reconnecting. Error messages in dmesg are somewhat similar to https://bugs.maemo.org/show_bug.cgi?id=329
Subjectively this problem seems to happen more often at higher McBSP bus frequency, while I also have seen it when running wlan driver at normal speed.

I never tried compiling kernel outside scratchbox. Installing scratchox would be a good idea anyway unless you are looking for extra problems/new experience Step by step instructions for compiling kernel and cx3110x can be found in maemo wiki.