My personal OM herd runs to the following:
OM1n MD (film advance not working)
3 x 50mm F1.8
50mm f3.5 macro
T20, T32 and F280 flashes
The OMxx bodies don't get enough use but the rest is fairly well exercised and I love the feel of the whole system - so neat compared to DSLRs which are huge by comparison. OM4 and the fisheye are my current favourites.