I looked, the finest TSMC geometry i see on the mosis runs is 0.15. IBM has a 0.13, but joining a university does not mean you automatically get all PDK's - hence all the work NC has done to make a PDK for the "common man"
The bottom line is - the search is for the professional, multi-100$ PDK. It *may* be around but I don't know where. For the most part, every time I see a PDK floating around, it turns out to be incomplete, bogus, or some "ESD-add-on" or "Advanced metal slotting rules" that really does nothing. Especially for the user that believes they can untar a file then autoroute a 50k gate microcontroller.
ASICK - I would try drawing in a boring process, as I doubt you really plan to go to production with your IC. (And if you do, call TSMC, they'll be happy to send you a PDK if you promise 1000 wafers/month!)
If you want to see in a simulator how this TSMC process "feels", mosis extracts some crude models from every run they make.
**broken link removed**
With the help of a spice manual, you can get your circuit running with these and have a pretty good (if only first order) approximation of what your circuit will look like in these low-linewidth processes. (And the answer is: it's fast but Rout sucks)