My lensmaster page is a PR4 by checking SEO Quake. I'm a Giant. Sorry to bust your bubble, but when you comment on a lens, your comment is automatically coded NO Follow by Squidoo, so putting your comment on many top ranked & high PR lenses will not get you any juice.
Even tho there's a link to the commenter's profile page, Squidoo code does not pass the juice.
The lensmaster also has the option to strip all html out of every comment on their lenses, and approve every comment before it is published on their lens.
Now, if you have a high PR profile page, yes I believe you can insert any of your other links outside of Squidoo on your profile page, and the juice will leak..............BUT there is no way for you to spam another lensmaster's profile page with your link...........except by joining their fanclub, which will put your avatar on their profile page. This might be great, if you could find someone that only has a few in their fanclub, and you've got a great avatar..........but highly unlikely, as the higher PR profile pages have 100's of fans.