Exchange support have been added in the last Android 2.0.
Currently, my widgets doesn’t support it.
First, I need a Android 2.0 phone to improve and test my widgets… but no Android 2.0 phone exists in France at this time.
Unfortunnately, I can test only few things with the emulator, but not Exchange 😦
Another problem is : Android 2.0 framework sources release.
Google doesn’t provide Android 2.0 sources at this time.
Without sources, it is VERY difficult to know how to access Exchange informations from calendar.
If you really want to use my widget with Exchange, you can use ‘Touchdown Exchange’ which is able to sync Exchange with Google calendar.
EDIT : job done ! Pure calendar now support Droid Corporate calendar.