The aciddome has been online since at least the year 2000. Actually it started a bit earlier in 1998 or something on some shared domain from a local ISP in Alkmaar.
Aciddome runs on the following:
- Dreamhost Hosting (huge traffic and datastorage, highly recommended)
- WordPress with quite some plugins
- All in One SEO Pack
- 404 Notifier
- Google XML Sitemaps
- Smart 404