There are quite many screenshot services around my friend:
http://www.google.nl/search?hl=nl&cl...G=Zoeken&meta=

About the online check... You can easily check this kind of stuff with cURL or something. Don't know if thats the most ideal solution tho. I'm sure Kalle knows how to do it the fastest way. :)

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Nunchaku! Who doesn't like martial arts? =)