This is a Plectranthus, isn't it?
P. ecklonii 'Tommy', to be precise.
Please, anyone who reads this, correct me, if this is wrong. I bought three of them early in the year, and they were simply marked "sun annual" - oh, well! Apart from the Angelonia (see an earlier post), nothing has bloomed as long in my garden as these no longer small "annuals". I am taking cuttings for next year (doing well), just to be sure I'll have some again in 2009, but now understand it's a plant that will come back in the garden year after year, as long as the winters aren't too severe. Who knows? For now, at least, it's a wonderful focal point in my garden and continues to attract butterflies and hummingbirds.