I'm at the Mashed Museum developer/hack day – the room is silent except for the clatter of keyboards and the occasional sigh.
I'm having a go at generating dynamic XML data sources from collections data sources for the Simile Timeline widget; it'll be interesting to see if we can link this with Google maps mash-ups that other people are producing.
Mia,
If you like our Timeline software, may I also point out our Exhibit software?
http://simile.mit.edu/exhibit/
Exhibit integrates maps, timelines, faceted browsing, etc., and we're working on a lot more innovations for version 2.0.