for part of tomorrow (Wednesday). See this post also for more info.
http://www.thestrikepoint.com/cgi-bin/bbs521/admin_config.pl/read/203858

If I can stick to my timetable, it will be unavailable from approx 9am for between 3 and 5 hours.
I will make a final post just before I start the switchover, or earlier if anything changes.

You will still be able to view the board but if you make any posts during that time they will be lost and wont appear on the new bb.