Hippie: I do that type of stuff a lot too, phrasing triplet patterns in groups of 2 or 4, and the other way around too. It makes things so much more interesting, doesn't it?
One thing I've been working on for a couple of months now is "implied metric modulation", as Steve Smith calls it on his DVD. Which is basically taking a bar of 4/4 time (bass on 1; snare on 3, 8th notes on the hi-hat), subdiving it in triplets but phrasing them in groups of 2 (something like: 1 & A 2 & a 3 & A 4 & a ), playing the accents alternately (sp?) between the bass drum and snare. The real tricky part here is that the hi-hat must keep playing steady 8th notes!