FYI, PLDT will be redeeming these shares in January 2012. A paper copy of the notice to all shareholders is being sent to your registered addresses. The notice is also available in PDF at the link above.
If you think you have shares, you might want to start working on getting the paperwork done, especially if your stock certificates have been lost. If you need to check with PLDT if you have any unclaimed stock certificates, bear in mind that since the issuance of this notice, the PLDT office has been swamped with inquiries from shareholders. It might take a few visits and good timeing before you are able to get served.
This is also a good opportunity to get any stale dated and undeposited dividend checks on these shares redated when you visit the stock transfer agent.