How much for two 20A lines?

About $100 an outlet plus material markup.

This is assuming you have space in the panel for two more breakers. If not, then it's up in the air since the only option you'll have is a subpanel. You'll need to have the feed-thru lugs freed up in order to catch a subpanel.
Worst case: subpanel ($24.00), main breaker($9.00), two 20-A breakers ($10.00), 2 outlets ($20.00 stsd), 2 boxes ($4.00), hardware ($20.00) and 250-feet 10/2 Romex ($100.00), 2-outlet labor ($220.00), subpanel labor ($100) totals about $500.00

Of course, if you're going the Wattgate-FIM-cryo route, then a lot lot more.

I live on Long Island. It cost me $150 to have one installed two years ago. It was part of a bigger job so it might have cost a bit more if it was stand-alone. The installation included about 50 feet of 10-gauge wire, one 20A outlet, and one circuit breaker.

Slipknot1, I live on the Philly side of the Delaware. I just talked to an electrician today (who I happen to work with). He's going to schedule some time to come over my house and run 2 dedicated lines. I bought 2 PS Audio Power Ports, he can get the 10 gauge Romex. I don't expect mine to cost much, because my outlets are only about 5 feet from the breaker box. I was wondering though, I've heard people recommend getting the grounds isolated as well. I don't know what this means, but I'll ask him when he comes over. Does anyone here know what that means? Should the lines each have it's own isolated ground? He's very busy, but he said he should have it done by Thanksgiving. I'll let you know what it cost then.

John

give me a case of beer on a free saturday + materials.....

yeah, there really are bluecollar audiophiles. On a job like that it depends on the run, $400-500 would be a fair price

I put in one 20 amp outlet and breaker myself. Total cost for material 50 bucks. The hardest part was patching all the holes in the drywall.