As a site grows, you need a larger infrastructure to support it. We got caught a little flat footed this month when traffic spiked, and server demand outstripped supply.
To rectify this, we have migrated to a new, bigger home. Unfortunately, a job that we felt was going to take a few hours, ended up taking a couple days and we lost a little of the functionality of the site during that time. (apologies to those who wanted to comment)
Anyway, the site is now fully operational again...and ready to host all the unnecessary media files that probably overburdened it in the first place.
Thanks for your patience during the switch!