Seems one could put together a nice trip cost by combining this, though I haven't delved deeply into the idea...
http://www.flyertalk.com/forum/club-...tion-stay.html
Add the online booking bonus, plus the current points bonus that increases the more one stays, throw in a night or two at the F&F rate, and the 2-for-1 or 4-for-2 rate. If all of this works, it makes the head swim.