This was posted on the official site reguarding a possible downtime.
During this coming weekend, due to the recently announced security vulnerability in certain routing devices, many ISP's, including ours, will be conducting emergency maintenance on their network to correct this issue. This may mean players experiencing brief interruptions in connectivity to the SOE game service as ISP's across the Internet reboot their routers to install the fix. We apologize for this unavoidable inconvenience.
I happened to notice the CERT advisory reguarding this issue, it will probably affect PSU as well over the next few days. As it effects a rather large company, which provides quite a few of the Internet's routers.