[wily]

I KNOW this has to be basic.

But, I have a 30sec. dv clip that I'd like to have running
underneath a logo.

The logo is stylized text.

How is this done in iMovie?

Thanks a ton in advance...

[k_munic]

no, iMovie doesn't do that (without plug-ins)
QT pro can fix your problem, open .dv stream, open grafix, copy grafix, switch to movie, add, open information, choose track grafix, choose backgroudn color.

[wily]

Thanks - any problem with transparency? Any preferred graphic format?

[Uncle Skeleton]

transparency doesn't always work as expected in QT. The surest bet is to make a transparency mask, which is a picture file with black where you want picture and white everywhere else (or vice versa, I can never remember). Then you open your graphic, go to Movie Properties -> Video Track -> Mask and set that picture as your mask. Make sure to save your mask picture in a lossless format like tiff.