Tricosa's Tiong Bahru. See her Flickr stream for a surfeit of photos of this stunning shawl, which elicited 40 comments so far. Too bad it is laceweight, while my yarn is closer to worsted weight. (It claims to be worsted, but at 5 spi, I'd call it dk.)
Next was maanel's Less is More Shawl, always a good concept. Again, though, the yarn weight isn't a match. This one uses sock weight yarn. Then I came across multiple red versions of Rose Beck's Falling Water Shawl, one by the designer, one by suseknits, and one by Prairie Piper. This last one was aran weight. Decision made!
I began the plain stockinette portion with a variegated hank of the Ella Rae worsted, reasoning that its reddish tones would combine with the bold red to produce a shawl that might mix with more of my (invariably brown) shirts.