Be aware that this is only a partial list of WGA members who actually maintain homepages, and if you are looking for a particular screenwriter's homepage, you may also wish to check Yahoo or another search engine for its location. You might think that the only screenwriters posting homepages are those working in the nascent arena of new media, but in fact, every entertainment genre and medium is represented by these webpages. Some are primarily feature writers, others episodic writers, others work in the documentary or animation fields. If Larry Flynt Was President. Oedekerk's website is on the cutting edge of Web technology, heavy on Shockwave animations, streaming audio, etc.
Several writers use their webpages to help sell their books.
Unlike hard copy, though, these credits connect to numerous other websites with additional information about the various series and projects I've worked on, which is great for the fans who find my page. It allows me to do a unique form of self-promotion. And frankly, it's just plain fun. You're an entertainer. Mastering a basic level of HTML isn't that hard.