I looked as well for other FFP partners, no luck.
If you want miles, I just received a mailing from the Flamingo offering 1000 OnePass miles/$59 weeknight stays for the summer. Comes with comp food and drinks deal. Offer code: MFCAIR3.
Personally, I kinda liked the circus acts at CircCirc; as for other hotels, you can't take the 'Vegas' out of any of 'em.
Have fun out there!