My favorite thing about TiPb is that it saved my life!
I spent New Year's Eve in Seattle with my children and had an early 8 am flight back home on New Year's Day (I know...but it was cheaper). I read TiPb on my Kindle, and before I went to bed in my hotel room in the wee hours on 1/1/11, I decided to take one last chance to sync my Kindle to the hotel wifi and download my blogs for reading on the plane. I read TiPb before I shut off my Kindle, and that's how I found out about the Apple iPhone alarm bug that caused it NOT to go off on January 1! Of course, that's what I was going to rely on to get up in the morning! Thanks to TiPb's alert, I used another alarm program and made my flight.
...I think I sent a thank you email to TiPb about this, but this was such a great save that I'd like to take the opportunity to tell the world.