For a real challenge, do it without using your notoriety.

By far, the greatest challenge for any bootstrapped startup is marketing. Just from this blog post, tens of thousands of people will check out the site, blog and tweet about it, post links etc...

Obviously this is an advantage that you've worked very hard to gain and you must exploit, but you can't say you're standing in the same shoes as all of us other, completely unknown, bootstrappers.