Browser wars: a new hope
Nothing was lost in the browser and in the last years, Firefox has taken back some point in the browser market. So interestingly that after disbanding the team and not doing anything on IE for 5 years but plugging security holes, Microsoft decided to release IE 7, solely for XP SP2 and upward, in the hope to regain some market.
But this is not without counting on Safari.
Safari by itself made Microsoft not develop IE Mac anymore a by itself took a good chunk as the Mac market is somewhat growing a bit. The interesting part is that it is not based on Gecko, but on KHTML, turned into WebKit. Lars Knoll interview gives us a brief overview of the past and the future of KHTML and WebKit development, notably how Apple collaboration ended up working well and how KDE4 will have KHTML coming directly from Apple's repository. Now the WebKit for Windows is about to disturb the source: Apple's Windows port did land in the repository, and that port has apparently no relation with the non contribution from Adobe for WebKit + Cairo on Windows. I'm still unsure of the direct benefit of the port source code for Free Software, as it apparently use a mix between Windows native GDI and Apple own proprietary CoreGraphics (delivered as a non-free DLL), but nonetheless.
Now how will that still matter for Free Software?
It brings a standard compliant Free Software web rendering engine a broader audience, on that it is different from Gecko. Competition is good, and diversity is good. This engine is at the heart of KDE4, and is being brought to Gtk by the work put in by various contributors, including Alp's port to Maemo (Alp, you rock dude) making it valuable for GMAE and Gnome in general. Nobody will argue, Gnome is in dire need to something better than Gecko for its HTML needs: DevHelp, Yelp, Liferea, Evolution, etc would all benefit from it. All the enhancements made to the main engine, including support for new standards will directly serve the purpose of any Free Software using it.
Even more, being the browser inside the iPhone (and actually Apple's blessed development platform for the iPhone), this could leverage enough market share to make WebKit a major browser and have actually enough power to convince the Web 2.0 developers to ensure their development are compatible with it. And that is something noticeable. Remember when IE was the only browser tested and that developer didn't care to fix their mistake or standard conformance because anything else was too small for them?
 no I didn't say developed by Apple
 they released the source of their version but didn't contribute it back to the main WebKit
 more on that later