There are a couple of things from Patricia's Events module that would be useful in the Calendar module, especially the idea of From and To dates. I need to maintain events that cover 2 or 3 days - being able to define a To is very useful.
The events module seems to offer some more options for display (eg include Category), which I've not found in Calendar yet.
One odd thing in Calendar (perhaps I'm doing something wrong) - I set up 4 items with dates in March, April & May 2005. I can't work out what the sort order is - sometimes the April event is shown last..
Finally

I am working on a site that is in German. I see where I can change field names such as Date: etc in the module, but that's not very upgrade-friendly - are there alternatives (foreseen).
That's really all for now
Thanks
John