Josh - I am sort of in the same boat, what I have done is attend some local REI groups and join local REI internet boards (here, facebook, linked in, etc.). Having access to certain things on the MLS is something that a lot of investors look for, so I've offered to send expired listings, foreclosures, short sales, owner financed lists in whatever zip code or area that the investor is farming or marketing. I've had some of the wholesale investors that do mail outs to expired listings, give me back leads of non-motivated sellers, but they are still wanting to sell at retail (so I may get the new or re-listing). Being newer at both ends (realtor and investor), I'm not expecting things to happen an light-speed for me, so I don't expect much in return - as long as I'm not getting swamped. What I hope happens is that building relationship with investors will lead to eventually getting their listings (whether they are flipping or leasing).
~Buck