I find this sequence of URLs almost as funny as the blonde joke:

• http://del.icio.us/url/?url=http%3A//del.icio.us/
• http://del.icio.us/url/9a81616a6fdc3fd6cd432f0c3cce9b5c
• http://del.icio.us/url/b944c5e478a1e32dc71af722951498e3
• http://del.icio.us/url/3ddb685e75e1bd74363748355dc30d2d
• http://del.icio.us/url/e2ca7a0b59613504f3b0658a1b519b33
• http://del.icio.us/url/27209b794819a0dce0e3e970be2d1789
• http://del.icio.us/url/cd0b24de440fe51b2797b125a33b60e0
• http://del.icio.us/url/102ab8bb6becc7d3eac87f4c2707d0a9
• http://del.icio.us/url/aec6c8de3d189f18cdd85798f36bf716

I'm also happy that del.icio.us uses MD5 hashes to normalize this situation.

Update: I also see that Kottke beat me to the meta.