I have always purchased AppleCare with new Macs, and I seem to recall TechTool Deluxe being an important part of the bundle. I bought an iMac at the beginning of the year and neglected to pop in the AppleCare DVD at that time since I knew I was already registered for support and the TT app was migrated from my old computer.
However, today when I got the urge to investigate some drive integrity issues, the migrated version of TT wasn't compatible with the current OS and I couldn't seem to find my AppleCare DVD. Some Google searching shows that as recent as last December, the app was available for download from apple.com, however, those links are now dead and Apple's product page makes no mention of TechTool Deluxe whatsoever. (Micromat's own website has a sneaky past-tense "was" in their product description now.
So, what's the low-down? When did the bundle expire--did the AppleCare I purchased in January contain this on the DVD? Am I screwed if I can't find that DVD, or are there other download options? Any reasons I might not want to use that software?