The latest rumour about Led Zep reuniting is 4 dates planned for the Toronto Skydome/Rogers Centre this August. The Skydome is a massive venue that hardly operates as a rock venue nowadays because of the demands to fill it
Stay tuned for an official tour announcement, but for now start saving your dollars (cause you KNOW it's gonna be expensive)
On top of Robert Plant's website robertplanthomepage, it also says "Keep an eye out for Led Zeppelin Tour tickets in 2008!" (what could that mean ?), but not much else.
Stay tuned for the retraction