hi nicolas,
thanks for the update ...
as far as distros go, afaik trixbox is pretty much a dead project -- amazingly inept. from there i went to freepbx distro, but they have a very slow repository, and the rpms are unsigned. very dangerous -- a simple dns atatck, and you're cooked.
i took a loook at other distros, and simply decided that the best and most secure way was install a signed distro (centos 6 in my case), installed the development tools, downloaded the signed tarballs from asterisk and freepbx, and just built my own. so much more control and it has been running with marvelous stability. i'm now in charge of when i upgrade kernels, and asterisk versions -- i'm much happier doing this -- it's a bit more work, but a far more granual approach. centos 6 has php 2.3 right in the repository, and the epel for extra stuff.
freepbx distro, starting a few months back, included the 2.10 rc1 as part of their yum updates (although you need to run a script to get it to update properly), so there will be more users on 2.10 as time goes by. i just checked the freepbx web site, and they are are now on beta2, so i suspect that the final release will be available within a reasonable amount of time.
thanks for your projects -- they are just great.
cheers
m