Here are the URL that my web browser's auto-completion feature suggests when I type just a single letter:

• Internal admin site at our company, cannot tell you.
• http://budgie.sourceforge.net/
• http://cvs.sourceforge.net/viewcvs.py/budgie/Budgie/
• Internal development site at our company, cannot tell you.
• http://en.wikipedia.org/wiki/The_Sandman_%28DC_Comics_Modern_Age%29
• http://files.thilosophy.com/
• http://game.coden.ntt.com/campaign/hudsonframe.html
• http://hotmail.com/
• Company intranet
• http://www.japan-zine.com/
• Nothing for k
• http://www.lidia-ca.cdc.informatik.tu-darmstadt.de/
• http://ftp.mozilla.org/pub/mozilla.org/camino/nightly/2005-03-23-05-0.8.3/
• http://www.neooffice.org/
• http://oberon-media.com/
• http://perlmonks.org/
• no q
• http://r.gnavi.co.jp/g078504/ (Okay, this looks more than a little embarrassing, but we are having a company party there later tonight)
• http://search.cpan.org/
• http://template-toolkit.com/ (This does embarrass me as I am using the competing HTML::Template)
• http://www.ubuntu.com/
• http://www.verisign.com/
• http://www.weblog-japan.com/
• no x
• no y
• no z
• http://www.001t-and-s.co.jp/
• http://127.0.0.1:8200/
• http://216.239.63.104/search?q=cache:3aWlljIm7BcJ:google.thilosophy.com/
• Nothing for 3
• Nothing for 4
• Nothing for 5
• http://216.239.63.104/search?q=cache:3aWlljIm7BcJ:google.thilosophy.com/
• http://72game.com/
• Nothing for 8
• Nothing for 9

You should try this yourself, it is fun. I also wonder how stable the list is (probably not much, most entries are quite recent and many were just one-off visits), so I will repeat this experiment in two months.