Old talks in red Future talks in green Larger means sooner

I've been experimenting with other ways to show where and when I'll be giving Juggling Talks and MathsTalks.

The map shows a white dot for each postal district, a red dot for some past talks, and a green dot in a black circle for some of the upcoming talks.

The problem is, I feel that the map should be clickable in some way, but I don't know what a click would do. Should it give more information about the talk? Should it perhaps give the date, time and location? The problem is, there are many talks in small areas, so it would be hard to be sure you got the talk you intended, and it would be hard to get talks that are "hidden behind" others. Further, there isn't always that much more to say. Exact date and time is about it, really.

So I'd really be interested to hear your thoughts. I'd like to know how you think a clickable map like this could work. The technical side isn't that hard - the difficult bit is knowing what the user interface should be.

Let me know!

See also:

• Speaking Engagements for the actual list of talks.
• Talks In Space Time for a different way of plotting the talks.

Quotation from Tim Berners-Lee