From Sony Ericcson’s press release:
The P910 makes handling e-mails and web browsing easy with a wide choice of input methods. For example, the new thumb keyboard on the inside of the flip is particularly useful for writing longer e-mails and the five-way Jog Dial is ideal for navigating the phone’s functions or browsing the web. Additionally handwriting recognition using the stylus on the large color touch screen and virtual keyboard are valuable tools for SMS messages, taking notes, or adding a new contact or meeting.
