If you need high-speed waveform digitizers or transient recorders, have
a look at some sites:
www.ni.com includes products like the NI 5911 to digitize up to 100 MS/s
www.pxidigitizers.com compares different products & provides information
in general. It's only for PXI, it doesn't compare all vendors, but is
good as far as it goes.
www.acqiris.com various digitizers to 2 GS/s. (I find the boards and
drivers excellent.) PXI, PCI, cPCI, ...
www.lecroy.com are releasing PXI digitizers this year.
www.gage-applied.com various products
www.chase2000.com PC/104 and various formats. Also do high-speed ARBs.
Best, Mark