Who's wants to talk Boss OC-2? I know Janek does some interesting stuff over in his forum along with a Tc Helicon Nova Delay and Scott Devine has some great YouTube vids out the on his rig that uses one along with a Boss NS-2 Line Selector, a bass synth of some kind, and a Moog Low Pass Filter.
I've been running mine as such:
Markbass compressore -> Boss Oc-2 octave -> Mxr Bass Fuzz -> Danelectro Daddyo (missing from photo) -> Boss Bf-2 flanger
The daddy-o works especially well with the flanger, and a slow rate gives a really nice shimmer to the distorted octave tone, making for a deep convincing synth tone.
I also like the Boss over brands with latch switches such as EBS because I can "pedal dance" very easily on it, meaning I can turn it on and off for one note repeatedly.
I'll upload some soundclips if anyone is interested.
I love my OC-2!