I've seen some pretty incredible
PR sculpting using nofollow tags but I think John's method would have pretty much the same effect. I agree with Terry, its pretty much bullshit that we have two tags that say the same thing but mean different things. Especially when its proven that Google really does follow the links they just don't pass on your
PR juice. I am testing out the rel=nofollow tags on my blog following some recommendations on reducing duplicate links and such but we'll see how valuable that works out to be.