Since I've gotten almost no feedback for our urgent need to get the Sphinx add-on updated, I am posting here. The current add-on for XF 1.0 is partially functional--it only needs to have the added search options of XF 1.1 integrated into them. I do not have the luxury of time to code it all myself, although I have started on it. The hardest part is reverse-engineering everything (XF's search, the current add-on, etc.) to get it to work.