I know a great many people who would fall into the “late adopter” category, who are also avid content creators of one type or another. Very few of them use flickr. Fewer still have a Blog. None of them has a flickr badge on their Blog, or even create blog entries based on their photos in Flickr (which doesn’t seem that hard to me, but apparently is above the threshold of difficulty for most).
Web 2.1 will make everything easy. More on this later.