what i am uploading is a file.txt with extension file.txt.jpg, and it gets accepted, if you download the image in the url, you will get c100 shell in plain text.
in this url http://s3.amazonaws.com/satisfaction-...
it's were all your images get uploaded.
the image does not appear, but its upload to your could server in amazon
http://s3.amazonaws.com/satisfaction-...
a href="" rel="nofollow" oho
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a href="alert(1);" rel="nofollow"fdsfsfds
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a href="http://" rel="nofollow""[img]http://[/img]" alt="" /a
a href="http://" rel="nofollow""[img]http://[/img]" alt="" /a
there's no need for tutorials, its very, very basic 
i like that, keep it simple, and easy to deal with.
