While on the subject of Touchdown, here's my review:
I was a previous Palm user for 10 years. Palm got it right in so many ways with their PDA system. I was lukewarm about the stock organizing apps on both iphone and android. Agenda widget did not impress me and seemed a bit tedious. Further, non of the free apps I tried were robust enough.
I needed an app which worked like Microsoft Outlook, but on my phone. When I found Touchdown to be more of a mobile Microsoft Outlook system, I was quite pleased. I needed something that had powerful corporate email ability, and that would maintain a lot of the functionality that I so appreciated about my Palm phones. In detail, I needed something that tied in contacts, emails, tasks, and tasks associated with emails (flagged items).
I also seriously needed a calendar capable of more than light lifting, and is easy to use on my phone. A lot of calendars I saw were pretty vanilla in terms of their usage, seemingly marketed toward the light and casual schedule keepers. Touchdown's calendar is very robust, and even uses a readable 7-day view of all scheduled items and times.
A nice bonus is that color schemes are followed between Outlook and Touchdown's calendar. I color code all of my calendared items to differentiate between travel time, prep time, meetings, placeholders, and unscheduled tasks. Touchdown nicely mirrors this color system, although in different colors.
Their calendar widgets are nice, easily viewable, and come in all shapes and sizes.
The only drawback, albeit slight, is the $20 price tag. I'm used to considering "app prices," which run only a few shillings. I had to remind myself that this is really like a mobile outlook program that I can use forever, which helped.
Touchdown! Score!