Just completed a pretty cool project multi output splitter with independent buffers for each output. The Author of the project specs, claims there should be no crosstalk between each outputs. I've only had a chance to play thru it for a few hours yesterday but I do have to say it does separate channels really well! I setup my pedals with a really heavy distortion from one output into my "board" (its not mounted yet) and ran 2 additional outs from the unit to my mixer where I had panned hard left and hard right with differing amounts of reverb. It worked beautifully, the dirty channel combined with the other 2 clean channels sounded so thick. I played with differing levels to see that there was no distortion bleeding in. Much fun.
Got the plan from AMZFX here:
http://www.muzique.com/lab/splitter.htm