So Random Yank, just out of curiosity, what attracted you here?
A link from Something Awful forum.
Plus I've been interested in both rugby codes for years, but it's incredibly difficult to find any kind of rugby on American TV. Or any other non-American sport, for that matter. My first exposure to rugby was in the late 1970's when ABC's Wide World of Sports televised a RFL cup final match between Hull FC and Hull Kingston Rovers. I was a kid at the time and did not know the distinction between union and league.
Also, I was a huge NASL fan back then; contra what some have been lead to believe, NASL was very successful in places like New York, Tampa Bay, Ft. Lauderdale, San Jose, Portland, Seattle, Vancouver, Minnesota, Chicago, Toronto, Tulsa, etc. It was wild overspending on player salaries, rapid over expansion in the late 1970's with too many fly-by-night owners, combined with an economic downturn that killed off the NASL, not lack of fans or lack of native American players. NASL laid the foundation for the success MLS and USL are having now; and people who don't think soccer is successful in the USA right now, are either grossly uninformed on the matter (likely only paying attention to old media coverage of soccer, not new media) or they have a wildly overinflated definition of 'success'. If rugby league can stay realistic in its goals I don't see why it could not also be a success in the USA - just not an 'overnight success'. It's going to take a lot of effort over many decades to become an accepted part of the sports scene over here.
Edit to add: I see reading this thread that there is a strong Philadelphia connection with this proposed new league, both in the people putting this together and the fact they plan to play their first grand final in Philadelphia on July 4th (nice touch).
So, coincidentally, it just so happens that Philadelphia's new MLS franchise starts play in 2010, and they have just started construction on their new stadium (in Chester, just outside Philly) which will be ready for start of the MLS 2010 season in March 2010.
I don't know where the Philly rugby league team plans to play, but MLS will have a nice shiny new stadium ready to rent out if they are interested and if the MLS Philly team isn't playing a home match on July 4th 2010.
Others have mentioned Utah. There's a shiny new MLS stadium there; Rio Tinto Stadium. Los Angeles has the Home Depot Center, home of LA Galaxy and Chivas USA. Also the LA Sol; schedule might be a bit too busy there for a rugby league team. Denver Colorado has a new MLS stadium, Dick's Sporting Goods Park. If they end up putting a team in Chicago, Chicago Fire has a nice MLS SSS, Toyota Park, which has hosted a number of rugby union matches over the past few years.
This wiki on soccer specific stadia is a good resource to look for smaller stadia that might be useful for rugby league:
http://en.wikipedia.org/wiki/Soccer-specific_stadium