Here are two paragraphs on the announcement:
The Dreamcast web-browser and other Internet access software will be developed by Planetweb, who developed similar software for the Saturn Netlink peripheral. That software will evidently be updated on a quarterly basis, to continually add functionality that supports Java, Macromedia Flash, and future web-page enhancements as they are developed. Sega did not go into detail concerning the precise capabilities of the software that will be included with the first American Dreamcasts, but one can assume that it will be comparable to the current Japanese Dream Passport.
The starting page for Dreamcast Internet users will be the Sega Dreamcast Network. Sega’s goal will be to create a complete on-line community of Dreamcast owners; the Network will provide electronic mail, e-commerce opportunities, bulletin boards, web-based chat (including planned chats with Sega developers and executives), and game news and views. The latter will be provided courtesy of IGN.com, which in related news has been signed up as the official game information content provider for the Sega Dreamcast Network. At the launch, the Network will also interact with Sonic Adventure. Gamers will be able to upload information from their games (record times, especially cute Chaos, and so forth) and download various modifications and enhancements. …Expect something like the Christmas patch that was made available to Japanese gamers; it turned Station Square into the proverbial winter wonderland.