Once a month, we've got to perform maintenance on our commerce systems that requires us to take Logos.com and Vyrso.com offline for a few minutes. We typically do it sometime between 9PM and 11:59PM Pacific Time, but it's only for a few minutes, not the entire 3 hour window. We're always working to try to minimize the amount of time the site is unavailable.
Tonight, January 16th, 2013, is the first one of the year. In the future, I'll try to provide more notice. I expect the next one to occur on February 20th, 2013.
So, if you notice Logos.com and Vyrso.com being unavailable during these dates and times, that's what is going on.