A simple google search would answer that, but no worries, it is on ABC.
As for the pilot, I watched it with my GF last night. Overall I thought it was good. A little soapy, but not too over the top. I liked the variety of country music on the show, from the super poppy stuff by the Hayden P character to the more old-style stuff at the Bluebird Cafe. Interesting characters (Hayden P's character was too vampy, but the rest of the characters were good). And it was neat seeing all the establishing shots of Nashville.
It is sometimes hard for my girl and I to watch shows b/c she tends to not like most of the darker shows I enjoy, so I think this will be a good one for us to watch together.