The lights went back on in the ballroom and the media closed up shop. They've called a recount in Yellowstone Co. (Billings and environs). It's not clear what caused the recount--a local race, or this one, or what. They're not doing the recount until tomorrow morning, so we have to hang in there just a little longer.
Here's a picture to hold you over.
Update: Just so we all remember where we left off, there were about 35,300(+/-) 35,956 votes in Yellowstone Co, and Tester was leading by about 600 1,273 when they pulled the votes for the recount. (Thanks zknower for the numbers.)