I'm considering accelerating my IIcx as an alternative to outright
replacing it; the MacBSD FAQ has this to say about accelerator cards:

--------------------------------------------------------------------------------
6.4 Will my <insert name of accelerator card here> work?

At some point, I will create an accelerator-card-status file

Currently, both the 33MHz Daystar 030 Accelerator and the 50 MHz 030
Accelerator are known to work. You might need to disable the external cache
via the control panel first, though this appears to be unnecessary under
current kernels (1.1 and beyond).
--------------------------------------------------------------------------------

Question is: have any others been tested and found to work?  If so, which
ones?  And what's the fastest one that'll work in a IIcx?  And is it still
being made?  :)  Thanks to anyone who can help...

   ____  _             __     __   "Great spirits have always encountered
  / __ \(_)__  ___ ___/ /__ _/ /__   violent opposition from mediocre
 / /_/ / / _ \(_-</ _  / _ `/ / -_)   minds."
/_____/_/_//_/___/\_/_/\_/_/_/\__/               -- A. Einstein