[sdiy] cool synth uses for super high-speed op-amps & high-speed differential amplifiers?

[anthony]

I have 5 LM733's - high speed differential amplifiers or 'video' amps.
Anyone ever use these for something cool? I got 'em from old satellite 
receivers.

Also I have an HA3-2540C-5 which is a super fast op-amp from Harris.
It has a 400V/uS slew rate.

I thought if anything A/D/A conversion would be something to do with these.
Some kind of fast interefacing perhaps.

I also have a Calogic SD5001-MA which is like a fast 4066.

The last 2 things came from a Videocipher II - which also contained a 
matched/selected pair of CA3080E's.
I remember seeing a schematic once that specified a matched pair of 3080's 
but I can't find it.