This just in from the Official Site:

On Tuesday, May 23, 2006, at 5:00 pm US Pacific Time (6 pm MDT, 7 pm CDT, 8 pm EDT, 1 am UK, -7 UTC) the PlanetSide forums will be coming down for an Emergency Maintenance Update. The estimated down time is 1 hour. If the estimated downtime changes we will give notice on the website.

Head to PlanetSide.com to view this news post.