As I just found out from osnews there is a HaikuLiveCDScript available for building Haiku OS live CD. I'm not sure if it works anywhere else but on BeOS/Zeta systems, but there is a prebuilt image you can use here. I suppose you can boot it via Qemu or burn and boot it from CD.
I'll be checking that out just to see how far has Haiku come so far. I'll probably post some screenshots later.