I have changed from my custom template to the blogger template and it was a relativly smooth transition. Blogger's Template Designer takes all the coding work out job customizing your blog's look and it really is a delight! I will be able to easily change the theme of my blog to go with the seasons or just on a whim!
I also just discovered answer.com's answertips for blogs. It turns every word in your posts into a link and the info available is actually relevant. To try it you just double click on any word and it brings up a small window containing the definition and links to it's history and wikipedia page! It is a great tool!