No, not a collections database interface, Mia's onto that one. But I'm scheduled to work on the events database about now, and with the mashup day (now full up, I think) coming it seemed a good idea to grab a day and finish off this job. For ages we've had an RSS feed which gets a lot of use, including consumption by sites like dockland.co.uk, and of course search functionality onto the events web pages, but the feed is (a) a bit basic and (b) just shows everything for the next 14 days.
I wanted to turn the static feed into a properly searchable REST interface, as well as load it with more good data. So I plugged a hole whereby only a start date could be specified, put in filters for audience, event type, and keyword (like the web pages), and neatened up the separation into XML. Now it can be churned out in raw straight-from-the-database XML or in RSS 2.0 with extra hCalendar. I've got a couple of tweaks to make (adding in addresses and geo data) and then will invite the world. The plan is that you can set the format in the query string, so RSS2 will be one option but so will xCal (as used in Upcoming's XML) and whatever else - it'll just pick up a stylesheet and apply it on the fly. There are more filters I could apply, and documentation to do. Then thinking about pagination with OpenSearch extensions... and then who knows. Most of it will wait, so I'll post soon with the details on the where and how.