Those of you interested in Live For Speed, and fancy a blast from the old* days, or want to see what pre-S2 was like, might be interested in checking out this thread on the official forums.
I've simply patched the executables to look at the new master address, ensuring the executable size remained the same and with a little bit of luck discovered that the master server is still serving requests from older clients to unlock.
I'd recommend using 0.3H6, the last official S1 release. For a while you should find a 0.3H dedicated server running with 15 slots, voting and select map enabled.
* I say old days, this is of course not as far back as you can go. It is the most requested, non-current, client for unlock over the last few weeks though.