I know you can do it for frame grabs to make them cleaner, in photoshop, and I think you can use it on videos too. Whats the purpose? Nicer looking videos? How can I do it? I have Vegas and After Effects.

Will,

Most any editing suite will deinterlace.

It is easier to just shoot in 30 progressive or 24 progressive.

besides taking stills, for me I shoot wildlife and interlaced video gives a fliker to fast movement, not something you want.

I slow the shutter down to 60 and shoot 30 p. that makes the visuals more like what you would see. some people call it more film like but for that you really have to drop down to 24 p and the gl2 doesn't do that.

I prefer the look.