Yes, Adobe is no more selling Education priced software through retail. They are doing it direct through the education institutions, I think. The full price of Lightroom online (US$389) is on the high side though, especially when compared to Aperture (S$328). But of course Aperture is Mac only software. Not sure whether it will be cheaper at retail stores?
Having said that, I think Lightroom is a very useful tool for photographers, I am using the Mac version. Features of version 3.0 looks to be really good.