I think I stumbled upon a rather large security hole in Touchdown and its pin entry. I have a myTouch with the latest apps and patches on it. Nothing fancy, not rooted. If, when you get to the pin entry dialog in Touchdown, you simply switch to the phone app, then use the Back button (or Home, then Back...haven't done extensive testing), you're presented your Touchdown home - no pin entry blocking you, even after a fresh powerup. Is this sort of a known hack around these pin-style apps? Or is this a problem with the way Touchdown's pin entry works? Either way, a note to the developers is probably warranted? These days, IT depts are getting more and more secure-conscious with powerful phones like this, and may be upset to know that emails and contacts are as insecure as this. It was suggested by my IT dept that I purchase Touchdown a few months ago, and it works great, but this makes me worry.