Do you mean Flickr in general, or put Flickr pictures on your blog? I do it the geeky way (which is harder than the normal way, really, and probably a huge waste of time since the easy way probably looks better to begin with). Just sign up for Flickr (it’s free… just pick a username that’s not taken yet), and then go to the “Do ou have a Blog?” link on the homepage, and you can see all the cool stuff you can do with Flickr on your blog. If you need help, let me know.