I just installed GPE Calendar today, and I notice that the events have a "Details" tab with a "Location" field and a "Description" field. These seem to fit the bill of what you are looking for. As to iCal import, I have no idea. There is an "Import" menu item, though . . .

Have not used GPE enough to make any comment on stability, usability, etc., but in playing around with it it seems (a) stable so far (on N800, OS2008) and (b) like it has enough features to be really useful.