Open WebKit
Amid all the kerfuffle about Apple moving to Intel processors, one important piece of news got underplayed. WebKit1 , the system framework used by Safari (and other MacOSX applications), is now open-source. This is great news, as it means faster bug fixes and greater community involvement in the development of Apple’s flagship browser.
And, yes, there is a plan to implement MathML in WebKit (whose progress can be followed here).
If this actually comes to fruition, I may finally have to dump Mozilla …
1 WebCore, based on KHTML, was open-source from the start. WebKit provides a higher-level API and contains a lot of functionality not in WebCore/KHTML.