I downloaded a copy of AlarmList from www.freewarepalm.com. It's in the clocks|utilities section.

It has a useful menu command which shows a list of all the Exchange Manager associations within your Treo. For example:
Blazer
- http
- https
text/html
image/gif

The list is very interesting as you can see what filetypes are associated with each application on your Treo.

The application also has useful features for tracing all alarms and notification events active on your device. It's a useful look under the hood.