I merged 2 sites together into this one and I have hundreds of tags. Yesterday I deleted them all and started over again as I don't think I need them all. In fact what do I (or visitors) use the tags for? What's wrong with search? At times I simply don't know what tags are best for my entries. I did like UTW's inline tag feature such that I add tags while I type my entries.
'A year ago' and 'Two years ago' are added to the sidebar. My first post here was dated December 2004 so I guess 'Three years ago' will show something as well.