Nothing that I've heard of, but I think it would be EXCELLENT if you installed 10 different browsers and used them all at once.
That said, don't let MLBTV know you're logged in 10 different times or they might start charging you a lot more money.
"I don't buy everything I read,
I havn't even read everything I've bought"
"I find it more comforting to believe that this [life] isn't simply a test."