I thought the letter written by the NFLPA dude (Smith I think) was pretty good. If I remember correctly, he didn't make any demands and acknowledged that the players association didn't necessarily have any standing to do anything about it, but that they wanted to voice their potential concerns about someone like Limbaugh being allowed as an owner.
Other than that, no big deal. I'm glad enough of a stink was made about it to keep Limbaugh out. Of course, since the Rams are a division rival of the 49ers that would have just been a reason to hate them more.