Seamonkey 2.0 is not yet even in beta (there are alpha releases available). The previous versions of Seamonkey (1.1.*) are based on Gecko 1.8. There are plans to get Seamonkey 2.0 into beta "Real Soon Now" but that probably won't be until Firefox 3.1 goes gold.

A bit of a shame since Seamonkey is the logical inheritor of the the old Netscape feature set and look-and-feel, but done right (and with far fewer bugs). It even has a WYSIWYG HTML editor that works much like the old Netscape editor, except that it very rarely (if ever) crashes - Unlike Netscape, in which it was always a gamble whether you'd be able to get anything done in the composer before Netscape crashed and you'd lose all your work.

Yeah, it's open to the criticism of being a prime example of the Swiss Army knife approach to software design - but in fact it does many of these things quite well, often better than specialized applications. For example, although there are a few other open source WYSIWYG HTML editors out there, virtually all of the others have died on the vine at this point.