What goes around (or in the case, gets around) comes around, which is why it seems totally appropriate that Jenna Jameson‘s ex-hubby, some porn dude name Jay Grdina, is now dating Shanna Moakler! Yes, that Shanna, from Miss USA/Meet the Barkers fame. The new couple met at Shanna’s birthday bash in Vegas and have been inseparable ever since. This would be so sweet if it was all so x-rated. Even though their union is new, they’re already connected through all sorts of dirty Hollywood drama. Jenna, who is now with Ultimate Fighter Tito Ortiz, is also BFF with Shanna’s sworn enemy, Paris Hilton. You may recall Paris got it on with Shanna’s now ex-hubby when the two were separated. If the two ladies dislike each other (fingers crossed!) we’ll surely hear about it soon – they’re both avid MySpace journal-ers with a flare for the, uh, dramatic.