Evan,
The one in David Burnett's monograph looks much like the one on the market - much more so than that stunner on the blog! I haven't done any more work with A. sarian since I was able to get my hands on pollen of A. vangigoh, which is like A. sarian on steroids - aroid steroids! The main cross I did was A. odora x A. sarian and that worked fine but I have yet to get an F2 from that cross. Same with A. odora and A. vangigoh. I heard that someone did A. macrorrhizos "Borneo Giant" x A. sarian, but I went instead with Borneo Giant x A. vangigoh, which yielded my Imperial Giant.
LariAnn