I know many Reform Jews who believe fervently in God but who think that the Judaism practiced by the Orthodox is messed up, mixed up, outdated, misguided, or whatever.

That's me - at least on the surface. I tend to prefer the phrase progressive Judaism (http://en.wikipedia.org/wiki/Progressive_Judaism). My level of observance may change over time, but I remain committed to ideas and practices that expand and deepen our connection to God and each other.