Here's a roundup of some of the big news from around the world of mixed martial arts for this past week:

• Newly-crowned UFC heavyweight champion Randy Couture, fresh off his historic UFC 68 victory over Tim Sylvia, made the media rounds this week. Perhaps a sign of things to come, Couture did both a TV interview and an online chat with fans for ESPN.
• According to MMAWeekly.com, UFC light heavyweight champion Chuck Liddell's bizarre appearance on a TV show -- Good Morning Texas -- last week was due to a combination of NyQuil and sleep aid pills. Apparently, Liddell had been feeling sick for awhile and hadn't made it to the doctor. He was trying to get some sleep the night before the interview. If you missed it, here's the YouTube video of the interview. Liddell is now on antibiotics for pneumonia and is taking it easy. 
• According to Ivan Trembow of MMAWeekly.com, Nick Diaz failed a drug test at PRIDE 33.  The drug he tested positive for was marijuana. The bad news just keeps on coming for PRIDE. First, their lightweight champion, Takanori Gomi, loses a non-title match to the UFC castaway, Diaz. Then, we find out Diaz's training regimen for that fight consisted of bong hits and super-sized bags of Doritos.
• According to the AP, UFC light heavyweight star Tito Ortiz will be fighting his boss, UFC President Dana White, in a long-awaited three-round boxing match on March 24.  Apparently, video of White training for the fight convinced at least one Nevada regulator (the commission chair) that White is a better boxer than Ortiz. This fight will be aired on UFC.com.
• And from an IFL press release, IFL will be debuting a two-hour show -- IFL Battleground -- on MyNetworkTV starting next Monday, March 12. I'll have more on the IFL and the debut of this show next week. But for now, you should know that 2005 Playmate of the Year Tiffany Fallon is one of the co-hosts of the show (along with Bas Rutten.) Why? Because, she's the 2005 Playmate of the Year, that's why.