Carpet in the basement

Last week was a rough one at work, and it's only going to get worse. I've been filing on a lot of families lately, and I actually have to trials to testify in next month. Not excited about that at all.
Friday night I got home from work and let Kane out of his crate, only to discover that our carpet in the den in the basement was totally soaked - and I mean soaked. We went into the unfinished part of the room and there was water everywhere, but we couldn't figure out where it had been coming from because it was all in the middle of the room. So we spent a good portion of Saturday night drying it out. We were up until 11:30 or so working on it. We had FINALLY started to make some headway, so we went to bed. The next morning I got up, went to let Kane out, and SPLASH!! Right down into the den. Oh. My. God. So I let Kane out, and the floor is TOTALLY soaked again. I mean absolutely DRENCHED. Fortunately nothing has been ruined, except maybe the carpet. So we go to church, then we went to Home Depot to get a new wet/dry vac, because we were borrowing my dads. His didn't have any attachments with it, so we sent it back to him with my sister that night. John sucked over 14 gallons of water out of the carpet alone, and it was STILL soaked. And I should add that it wasn't even the whole carpet that was wet, just around the edges of the room, but it was coming out from the wall like 2 feet or more in some places.
We can't figure out where the water is coming from or anything. So we called the insurance company and we had these people over today to dry out the basement. They said we did a good job mitigating it, but they ended up ripping up the carpet so the floor could try out, as well as the walls. They'll be back on Wednesday to pick up the 5 industrial fans and the industrial dehumidifier. I can't wait to see our electric bill for October. Ugh.
Anyway, I'll keep the world updated when I find out more from the plumber. I need to go pick up some stuff before he gets here.