Is it true that ruby can be obfuscated? o_O Also, is it possible to pack image files, and sound files, and other files all into 1 file, but still be able to run the code? Thanks.

The most obfuscated I could get with it is the following:

index.puts("[blist"+(`ls #$wikidir/pages`.grep(/^#{letter}/).\ map{|s|s.chomp.gsub(/\.\d+$/,'')}.uniq+File.read("#$wikidir/gend").\ grep(/^#{letter}/).map{|s|s.gsub(/:.*/,'')}).sort.\ map{|el| "[item #{el}]"}.join+']')

I have an 8 line comment to explain to myself what it does.
Probably not nearly as obfuscated, as fyhuang said, as C or perl could get.

edit: wrote code instead of source
edit 2: it ate my backslashes
edit 3: removed the source tag to try to get it to stop eating the backslash newlines
edit 4: double the backslashes. If this doesn't work, at least I tried.

I posted this entry to the IORCC (International Obfsucated Ruby Code Contest):

        d=[30644250780,9003106878,    30636278846,66641217692,4501790980, 671_24_603036,131_61973916,66_606629_920,   30642677916,30643069058];a,s=[],$*[0]      s.each_byte{|b|a<<("%036b"%d[b.         chr.to_i]).scan(/\d{6}/)}          a.transpose.each{ |a|            a.join.each_byte{             |i|print i==49?               ($*[1]||"#")                 :32.chr}                   puts                    }

Obfuscated enough for you? :)

Edit: The board software removed three important back slashes.