One of the reasons that I switched to the new blogger is that I very much wanted to be able to use labels. I have long wanted to have some sort of categorization of my posts. I like being able to refer back to older posts and the labels make it much easier to filter and sort.
Of course it is still a major pain-in-the-ass to try and go back and label all of my old crap, but what can you do.
Also, I have found that I am not really sure how to label some posts. Random Thoughts is designed to be a bit of a catchall, but at the same time I would like to try and be specific. Again I will be sure to keep you posted.