Mike Industries' blog post describes Scalable Inman Flash Replacement (sIFR), a technology that allows designers to use custom fonts in HTML text by replacing it with Flash movies. sIFR uses JavaScript and Flash to render text using a font specified by the designer, while still being accessible to search engines and users who do not have Flash enabled.
Typekit is a subscription-based font service that allows users to embed custom fonts in their websites. It provides a massive collection of fonts optimized for web use, with advanced features like variable fonts, font events, and multilingual support.