Hi adias, welcome to the forum
Soft proofing's certainly a topic that's getting a lot of airtime at the moment, and I have no doubt that the Adobe team are well aware of the clamour.
OS X's soft proofing options are certainly a possibility as a workaround. I have a feeling Sean was mentioning something along these lines, so maybe he'll drop by and fill in the details for those who are interested.
Integrating it directly into LR probably isn't likely as there isn't a Windows counterpart and that would cause an awful outcry. Plus, Adobe like to do things properly if they're going to do them. Still, the team are very good at listening to feedback, so you never know when it may or may not turn up.
