HTC is busy these days at Mobile World Congress, in Barcelona. They just launched their first tablet and a series of new smartphones… some which feature a dedicated “Facebook” key. I’m sure people waste too much time on existing devices with Sense, until they get to open Facebook. Therefore, the need for a special key. :)
See more here and here

On a side note, Power Schedule has reached 500 downloads – not so bad for my first app (but these Market stats update so slowly – c’mon Google). Anyhow, I plan to release an update these days (1.2) – it’s mainly some UI improvements, to make it more intuitive for new users. If anyone can help with translations in other languages, I would appreciate it. Just drop me a message.