Re: Tilt & Shift Bellows fun...
Having been using Contax gear since the 1970s, it's been wonderful to be able to continue using it not just for film but also digital. Although the Contax bellows are the Rolls Royce of their type, even non-tilt&shift bellows can give macro work a new lease of life (and M42 bellows and standard lenses are cheap and plentiful).
My other fun right now is using Contax G lenses (45mm [sharpest lens I've ever used!], 28mm [sans rear baffles] and 90mm) via a Kipon adapter on my E-PL1. Admittedly, wide-angles are rather redundant but the 45 f2 Planar makes a lovely portrait lens.
I think the old glassware is really coming into its own again, 30 years on, and at a fraction of the price it cost originally. Zeiss + Olympus - a match made in heaven...