I guess I meant PGA then (Pin Grid Array), assuming BGA in the original post meant Ball Grid Array. I understood the F to mean (Flip-chip) although I'm not sure what that means.

Haven't heard of QFP before. Unfortunately I'm not too familiar with hardware terms. I should stick to what I know.

There is a BGA version of the IXP420. I use it every day in my work.

I didn't know there was an XScale Zaurus out, cool! Must go check that out. Thanks.