Bobafett81 tells about 2 special screenings taking place in Singapore on the 11th & 13th of May:

Singapore will have a Charity Premiere on 11 May 2002. Tickets at S$100 per person. In addition, there is a sneak preview for Singaporeans on 13 May 2002 through a lucky draw!

Here's an excerpt from Singapore's Channel 5 website:

Register with us for our exclusive preview of 'Star Wars: Episode II - Attack of the Clones' at Cineleisure Orchard on May 13 (Mon, 9pm). And to find out if you are 1 of the 50 fortunate winners, tune in to Channel 5's telecast of 'Star Wars: Episode I - The Phantom Menace' on May 12 (Sun, 7pm) and check for your winner's email notification . Tickets to 'Star Wars: Episode II - Attack of the Clones' can be collected on May 13 (Mon) at Cathay Cineplex Orchard Level 5, between 7-9pm. Tickets will be issued on a first-come, first-serve basis.

You can read more about the preview by clicking here.

Update:
The eradicator tells us that the tickets are on sale at the Herren (HMV) in Orchard Road and cost $120S each. Check out the scan of the tickets for venue details (click here). JediJean sends in the scan from a Golden Village brochure with details on the charity screening (click here), and a scan from the Straits Times Life section (click here).