Well, you are on a Washington Comcast account, which is the same ISP I use, so I know your ISP isn't blocking anything related to the site. I can also see the site just fine in Internet Explorer and Firefox. There may be something wrong with your installation, or you may ahve an ad blocker in firefox set to block a keyword that was used in teh banner image filename. Or your cache might be sufficiently fragmented that clearing it is having no effect.
I would try running a disk defragmentation and maybe a reinstall of the latest version of firefox and see if that does the trick.