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You want the oil to be in the engine's proper operating temperature range. I always figured 212F was "right", since that's where the "high temp" tests are done on motor oils. Some people like 180F, I always figured that there the oil would take longer than I like to outgas the water in it, which also pointed to 212F.
A number of cars through the years (mostly ones with sporting pretensions) have had oil/coolant heat exchangers. There was an optional one on some Civics (the factory manual for the 88-91 CRX shows it) in between the oil filter and the engine block, and the Porsche 944 had a separate one. Those would warm up the oil when the engine was cold--the coolant heats up a lot faster than the oil does--and keep it at operating temp when it started to get too hot.
So yeah, a known thing.
-soD
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