I've got a spinning cube with textures mapped to its variouse sides and was wondering if there is an easy way to capture this animation as a GIF, its lightmapped, bumpmapped and 50% transparent. I want to make a logo for a website out of it. There is probably no easy way to do this is there ):

I'm assuing you're using Windows, so you can change your OpenGL context to one that renders to a non-screen bitmap, and easily save that to a .bmp file with Windows API functions. It really leaves the realm of questions about OpenGL and just becomes one of saving image data to a GIF file if that is what you need.

ULead Gif animator is rather useful...

Although, I imagine the resulting file will be large... Can I suggest using shockwave... I've seen it done before in shockwave, the spinning 3d cube...