Apple have made it very difficult to open browser links in anything but Safari on iOS devices. Now there is a tweek available for jailbroken devices called Browser Changer. Browser Changer is a free download via Cydia.

Browser Changer allows users to set the default browser they would like to open links in. Users can now open in the following browsers: Skyfire, Droid Browser, CloudBrowse, or Opera Mini.
(via AppAdvice)
Microsoft’s answering the European Commission after a lot of struggling and starting tomorrow, March 1st, Windows users will have the chance to decide which browser will be your default in your machine.
Web Browser Ballot will be available in Windows XP, Vista and 7 operating systems as a Windows update. Soon as you download the update, a window will appear where the browsers will be listed randomly from which you’ll select your default browser.
I found very interesting the feature available for randomly listing the browsers, which avoids any suggestion that could induce a user to make a pick according to the location in your screen of the browsers. Here’s evidence of the random is actually working:
Internet Explorer 8 showing third in browser’s list.

Internet Explorer 8 showing first in browser’s list.

From what we know, the ballot will only appear to users that have Internet Explorer as the default browser; if you have any other as default, the list won’t appear to you.
For more information, here’s the official document with Microsoft’s commitment.