[joshglick]

There are two options and they both sound kind of cliched. 1)

1) The first is two find some way to "hack" together a product yourself. This can be as simple as a "demo" in keynote/powerpoint or something that you can show off to investors as the product initially. Or if you are in a service business, perform the service manually for a few customers (run it from a spreadsheet) and prove the need before plunging into full fledged development. Both of those will most likely also reduce the time-footprint of your development

2) A lot of accelerators seem to be accepting pre-product companies these days and I think this is the strength of a lot of the accelerators is to get you into the product stage. These could be a viable option if you have one in your area