Game servers will still be available.

According to posts on official SOE forums:

Beginning at 6am PDT on Tuesday, November 02nd, all SOE account and commerce flow and the Station Store will be unavailable for maintenance.

We expect this maintenance to take approximately three hours. During this maintenance period game servers will still be accessible. We apologize for this interruption and will resume the affected services as soon as the maintenance is completed.

Here's our convenient Time Zone Conversion Tool to help you plan.