Prior to this, I had only bookmarked my links (on the left side of my blog) in del.icio.us. It was a bit of a pain to go back through all 242 of my blog entries and tag them in del.icio.us, but I think having the Topic categories for my blog entries is definitely worth it, and improves some of the user experience on my blog.
I also quickly realized that I have a lot of tags, so I had to adjust the del.icio.us tagroll to only display my top 25 tags. The other benefit of this approach, is that Techorati will also pick up my tags.
There is also a cool foxylicious extension for adding your del.icio.us tags to your Firefox bookmarks. Hopefully Dietrich will add support for del.icio.us tag bundles in the near future.