Which part(s) of the k5 article do you agree with? The assertion that these people who until now only cared about PageRank will choose to start caring about getting their URL seen instead of finding a new way to artificially inflate their PageRank?
Are you worried that bloggers can now link to people without giving them PageRank? That they might hold their PageRank for ransom? That was entirely possible before; the problem that nofollow solves is making it easy to implement across the web.