Quote Originally Posted by Helen B
.... It's those lonely-heart silver atoms pining away, waiting for a mate so they can survive an hour instead of a fraction of a second.
He he - beeuudifool.

I haven't seen any meters that take reciprocity failure into account either, because it is the individual films' makeup that dictates its performance during conditions of reciprocity failure. I tend to use FP4+ for the same situations that you are considering and found that using the exposure graph in pdf specs file for the film to account for RF works fine (in my experience up to 6-7 mins so far).
If you wish to allow for the effective change in contrast due to RF, Helen's suggestion of changing the development specs I think, is very good. Would take a bit of experimentation.
definately take a look at the FP4+ spec sheet to start with - it's actually quite easy.
regards, John.