Oh, semantics. Although it may have been believed that Sonic Unleashed was hitting retail tomorrow for all consoles, apparently those dates weren't "official." Sega has rectified that by announcing official launch dates today (via IGN) stating that the Wii and PS2 versions will be available tomorrow, while the Xbox 360 gets its werehog on next week. As for the PS3's Sonic Unleashed, it has been relegated to an indeterminate December date.
Yes, we know, dear Xbox 360 and PS3 owners, whatever else shall you play while waiting for Sonic Unleashed?!