Sam Adams has had an IPL on the market for some time now. I find it pleasant. Not something I would seek out on a regular basis, but for a light hoppy beer I enjoyed it.
I certainly wouldn't object to IPLs becoming a mainstay in the brewing market. I feel they have their place. I know it's not something most microbreweries can do, what with it being a lager, but I think anybody with the right gear to do a proper lager should look into trying their own IPL.