Our servers are getting moved from one data center to another.  The move should give us a faster/more reliable connection to the internet as well as a much better battery/generator backup in case of power failure.  We had an outage earlier this year cause by the power company and this new data center will be equipped to run the server on a generator for days without power.  The data center move will take place Friday 9/25/09 from 7pm to 9pm EST.  I don't think that we will be down for the whole 2 hours, but it is hard to accurately predict these kinds of things.
We are sorry for the outage, but do believe in taking the appropriate steps to make sure that our servers are as reliable as possible.