A couple of (lagged!) updates on my FreeBSD/PmcTools work:
In Nov'08, I added support for Intel™ Core 2™ PMCs to PmcTools (SVN #185363 and later changesets).
More recently, Nokia, via Jeff Roberson, contributed basic support for the PMCs in the Core/i7™ CPU, the next member in the Core™ family of CPUs (SVN #187761).
With these additions PmcTools supports most Intel CPUs that have PMCs in them. (I have plans to finish support for 166Mhz Pentium MMX™ CPUs soon.)
A couple of tricky bugs were tracked down and fixed:
Thanks to Artem Belevich, Fabien Thomas, George Neville-Neil and Jeff Roberson for their assistance with debugging.