Shortly after Linux 2.6.33 was released the respective Gentoo kernel sources became available as well. Curious as I am, I decided to give the new kernel a quick whirl, possibly in the hope that my Pulseaudio<->ALSA problem might be fixed.
I tried this with my PC at work, which is equipped with an old GeForce FX 5200 Nvidia graphics card. To get the kernel with that card going, the legacy Nvidia driver 173.14.25 is required. In the current Gentoo Portage tree unfortunately there is only 173.14.22. That is not too much of a problem however. As a very Quick’n Dirty solution simply copy
ebuild nvidia-drivers-173.14.22.ebuild digest
and then emerge the driver, after you have compiled the 2.6.33 kernel.
The Pulseaudio<->ALSA problem however is not fixed, although it appears to take longer until the problem shows up. What is worse, my previous workaround (compiling the ALSA 1.0.20 driver and install the modules over the kernel modules) does not work any, since the ALSA driver won’t compile with the new kernel, since some include files have been moved in the kernel tree.
So I guess I’ll stay with kernel 2.6.32 for the time being until I receive my new PC in the not to distant future.