[mbenjaminsmith]

I built an events search that aggregated data from several sources - upcoming, last.fm, etc. It didn't work out, mostly because even with multiple sources of events and a lot of data massaging, it was hard to get more than a page of results for any location / topic. At its best, it would just show a page of random results for a givne location, which was probably what it should have been in the first place (an aggregate calendar).