Found this text on the Sony Black Sabbath site.. Once I hear more, I’ll post it.

"Under strict orders from Ozzy’s doctors the final five shows of the Black Sabbath 1999 Reunion Tour have been postponed. The rescheduled dates have yet to be confirmed but they will take place sometime in May or June. As soon as the dates are finalized we will post them on this site. Thank you all for your understanding and well-wishing." -Black Sabbath Management

In regards to Ozzy’s throat problems.. The Reunion tour booklet is listing Vinny Appice as a backup drummer (just in case). With all of what Ozzy’s gone through, they should have listed Ronnie James Dio as a backup singer (just in case).