Yeah. Part of what made the Tea Party a thing is that they co-opted with an existing party. Of course, that goes against so much of what OWS stands for, that this likely won't happen.
Still, before the Tea Party did this, they had similar cohesiveness issues. In the beginning, it was easy to get a bunch of people together under the "lower taxes, government is too big" banner, but once you tried to get anything more concrete than that, you began to realize that this was really a conglomeration of a lot of different people with a lot of different views, that only happened to share a few core values. I think this is likely the case with OWS. In order to gain any real momentum, they'll have to come up with a more cohesive stance on many issues without splintering their own group into oblivion.
Potentially doable, but it will involve a lot of compromise and organization.