"DOMO is a strange creature born from an egg. One day he fell into Usajii's house,the old rabbit likes TV. After that he began to love watching TV. He is gentle and strong. When he is in a bad mood,he breaks wind. "
Source: http://www.domomode.com/profile/index_e.html
Here's more that might help explain what Domo-kun is, but probably not.
Basically, Domo-kun is a mascot on Japanese TV. Yes, he farts. He is apparently very popular over there.
Domo-kun is also very popular with the photoshoppers over at fark. Cliche Kitty, also included in Nasty Pope's photo above, is another favorite at fark. Altogether, it's a very farky photo.
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"And Wirthling isn't worth the paper he isn't printed on."