Lynn's been busy.
I have here a list of IP spoofers/anonymizers, and I will be blocking some of those IP numbers if we've had any problem posters from them. If you can't post or log in, this may be the reason. We have found that a lot of trolls use these services. This may inconvenience some well-intentioned folks, and for that I apologize, but we have had enough.
For the Straight Dope
And I seem to recall that she did this a few weeks ago, too, but I can't find the thread where she announced it.
So it looks like you may have been temporarily caught in the crossfire.