This just in from the UFC via twitter:

"The Ultimate Fighter 10 - Heavyweights" premieres on Spike TV on Wednesday, September 16th at 10pm...And the coaches are...

...Rampage Jackson and Rashad Evans. Don't miss these two rivals coaching against each other on The Ultimate Fighter 10, premiering in Sept.

This disclosure could be in reaction to Rampage's announcement of his status as a TUF 10 coach early this morning - unless Dana White has something else to announce tonight at the Spike Video Game Awards.

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UPDATE:

USA Today is reporting the following regarding Rampage's decision to take on coaching duties on TUF 10:

UFC President Dana White and Jackson said he was chosen as a coach because he wanted to face Evans. Jackson said he remains angry that Evans confronted him in the cage immediately after Jackson's March win over Evans' teammate, Keith Jardine, at UFC 96.

And as a result it looks like Machida/Rampage will have to wait until 2010:

With Jackson out of the picture, the new champion's next opponent likely will be named today or tomorrow, White said. A report on Machida's website that he will be fighting at UFC 103 in September is not true, White said.

I would assume Shogun Rua will be Machida's next opponent for the following three reasons:

1) He's coming off two wins in a row (maybe not best-quality wins but it's something most guys in the LHW don't have)

2) A victory over Shogun will help build Machida up for a mega-match with Rampage

and most importantly...

3) He's free on the schedule