Comment spam has been increasingly problematic for WordPress blogs. In the past few weeks, I have been getting twenty to thirty spam comments per hour. Users mostly never see them, but scanning through and deleting the spam comments (important, because occasionally legitimate comments land in the spam bucket) has been increasingly time intensive.
However, I just installed a new WordPress Anti-Spam plug-in, which so far seems to have reduced the spam comments to nil. I could still post comments, both logged in and logged out and trackbacks still work as well. However, if you have problems commenting, please drop me a line.