You can use "mysite.com" way in Google to find your PR6 backlink. If you don't find it then check caching date and try to guess when it will be cached next time.
you can use www.digpagerank.com it is owned buy a dp member green is ok red is fake orange non-confirmed
That link from wups.org is true. There isn't any nofollow tag. It is noticed only by AltaVista for now.