DIY Stereo effects?

[Drew Hallenbeck]

I've seen a few things that have given me a couple of basic ideas but I'm interested in finding some more.
Anyone have any suggestions for some cool stereo effects?
Looking for things with stereo in and out that maintain separate signal paths.
I was looking at the BTDR-3 belton brick which has stereo outs but if you're running stereo ins, they're summed before hitting the single input to the brick........ bummer.
So, any ideas for delay, reverb, chorus, phaser, tremolo, etc. would be greatly appreciated!