Borderlands via Twitter, announcing the re-release for Xbox 360, PS3 and PC on October 12. The package will include all four DLC add-ons, plus a foldout map of the game's territories. The GOTY Edition will be priced at $60 for Xbox 360 and PS3, and $50 for PC.
Today's announcement also seems to confirm that the "Borderlands GOTY Official Strategy Guide" is real. The guide popped up last month in a GameStop listing (but has since been removed from the retailer's site).