For what it's worth, I attended the NY Auto Show on Saturday, March 30, and spoke to two different Subaru representatives about the STi. The first man walking the floor said that around 3/4 of the people who asked him about the WRX also asked about the STi. His statement was that he expected the STi in about a year, and that it would feature 260-280 hp. No word about pricing.
The second person, a woman behind the desk, was more positive on the STi; she said that it would be here in a year, and likely would be unveiled at either the NY, Chicago, or Detroit auto shows. She said that she'd heard that the STi could range from 260 - 340 hp (!), but that she hadn't heard anything definite yet. Neither would say anything on possible pricing, but it did seem like there was a LOT of interest about the STi, and that Subaru had noticed.
In other news, Mitsubishi showed the European-spec Lancer Evo VII at its display, about 100 feet from Subaru's. Seemed like a warning shot to me.