IR-only imaging

There are a few great sites on the ability to get good effects using low-pass filters and un-IR-filtered ccds. (similar to shooting IR sensitive film)

With the fantastic cloud patterns showing up on Cassini's Saturn images in IR, I'm wondering if anyone here is trying it.

Trying it but not having really good success. CCD sensitivity falls off fast above 800nm - have to use a lot of gain which equals poor S/N ratio. Haven't tried it with the Sony Exview yet, maybe some potential there. Also hard to find reasonably priced bandpass filters in the near-IR and none of them are in a standard 1.25" or 2" astro format.