I use the Manfrotto "triple microphone holder" [
http://www.adorama.com/BG154B.html ] and carry it in a bag w/ my stand. It's a little pricey - I found a good deal on a new one on eBay a while back - plus it's only 26 inches (might be a deal breaker for some). Rock solid, though! I haven't tried it yet, but I suppose you could move the center mics forward with 2 t-bars, or even further with a superclamp and extension pole.
Thanks for the link to that Rode interview! Watched the whole thing (an hour+) the other night... good stuff!