FreeBSD 7 (link in PDF) is rapidly approaching, and its looking REALLY powerful. Its got some special performance improvement for multiple processor systems like the Achilles. I plan to upgrade the Achilles to FreeBSD 7 soon. I may wait for 7.1 for the Achilles. I need to try it on the local systems first. In the meantime, there is a FreeBSD 6.3 upgrade that will also need to take place, so expect some downtime for that too. Look for an announcement soon.