Some people who don't use Firefox on N900 regularly may have missed this, but there's an add-on called Near Me available which uses the cell signal to determine location and then you can find useful things near you (restaurants, petrol stations etc). Very well implemented and easy to use and a decent alternative to the lack of a real Google maps app on Maemo.

While I love the speed and power of MicroB, the clever UI design of Firefox (the right and left swipe is genius in my view) plus the added functionality through extensions/add-ons (Twitter Bar, Near me, Ad Block etc) mean I use it as my primary browser on the N900. Whenever I go back to MicroB I find the handling of multiple tabs/windows a little clunky by comparison.