On my main site, when I click one one of the articles, rather than going to the selected article, it goes to a TINYURL page that says..

Error: TinyURL redirects to a TinyURL..

Anyone have any idea what's going on here?

I could help you out... I'd need to see the page where what you say is happening... that way I can point you to the code where you're getting that issue.
If you don't want to make your site public, feel free to PM me.

Go get bad behavior plugin and install it, also wpsecurity scan. I used these and it removes any back alley attempts at taking over your blog. I do not have experience with the exact error you are having, but these plugins are crucial to stopping jackoffs from taking over your blog. I hope it helps to remove any attempts like the ones I had on my brand new blog 2 months ago, a Russian hacker attempted to use the tinymce hack to get access to my blog. These plugins stopped the guy from getting in.
*Let me know if I can help by looking. A pm is fine for me too.

Originally Posted by HeadBone

Go get bad behavior plugin and install it, also wpsecurity scan.

He.. I totally forgot about these!!!

One more thing you could do to secure your WP install is to simply change the folder structure at installation. Hackers are actively scouring the web for wp-admin and wp-contents folders... so if you changed your folder structure to something totally random it would make your site a bit harder to find.

Check out here.
http://www.blackhatworld.com/blackha...g-hackers.html

Thanks for all the great advise guys and sorry for the delayed response. I ended up getting the problem fixed but I'm going to look into that "bad behavior" plugin right now..