Yes, its built-in for the Nikon D90 and higher end of the Nikon DSLR series but only introduced in the latest Canon model - Canon 50D. But do note that while you shoot in RAW, this automatic correction will not occur automatically. Thankfully for Canon, the supplied software that comes bundled can still perform CA correction during post image processing.
Hence, to activate CA, remember to turn it to JPEG shoot to enjoy cleaner color edge images!