Dual Extruder

I'm just wondering if anyone has done any "custom" dual extruder setups, aside from the default available from gCreate? If so, I'm looking for ideas if anyone is willing to share pictures.

Looks good grumble. I'm slowly working towards getting my e3d's online. Very slowly... I'm finally printing stable and don't even wanna look at it sideways. I know Ray has something exciting in the works that's going to make the upgrade more flexible for everyone. I don't want to give anything away, but I'm sure he'll jump in with details when the times right...