As expected, Palm has announced the Treo 700w, a Windows Mobile powered smartphone with a square 240×240 resolution. Top brass from Palm, Microsoft (including Bill Gates) and Verizon Wireless gathered in San Fransisco this morning to launch the device. Palm noted that this project has been in the works for, “a couple of years” and that it was one of the worst kept secrets in the industry. In addition, here (.pdf) are some Windows Mobile UI design tips and tricks. Update: Here is the official press release.