Today 37 signals launch Basecamp Mobile. A mobile-optimized version of their project management tool for viewing in and webkit-enabled browser. This covers your iPhones (iOS4+) to your Androids (2.1+) and the latest Blackberry's (6+). As usual user experience wins for the mobile optimized views, and they've managed to maintain a familiarity with their desktop UIs, which the 3rd party paid apps often struggle to do. A long overdue win for Basecamp users.
And in one fell swoop they've killed the business model for the eleven Mobile App Developers on their Extras page that relied on the previously poor mobile browser user experience to sell their apps. Quiet day around the Summit office.