I always like to plan my caching adventures, so I can get the most out of it.
Ever since I saw the small event calendar on GC.com, I'm wondering "What if we could add a list or query to this?" I think an interactive calendar would be nice.
F.e. when I'm going to attend a certain event, I'd would be a visible aid to see I already have a list linked.
Or just on a free day for that matter...
And also, I don't need to see the 9 events I can't go to on the calendar... So I guess it would be nice if we could personalize that option more.