Sampling Reverbs with Fruity Convolver
It's sample week here at Image-Line first sampling VST's now sampling Reverbs
You can also check the manual (down the bottom of the page) for a nice list of links to pre-existing impulse response files and some tips of making impulse responses from real spaces.
Here's an impulse I made earlier in my bathroom. I used a pair of AT3032 mics into a SoundDevices MixPre then into an Edirol R44 digital recorder running at 24 bit 44.1 kHz and the 'hand clap' method.
Download the impulse below...