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You may have heard the song, but the cartoon video is great. There's No One as Irish as Bareach O'bama.
On the pessimistic side, there's a pretty persistent meme out there comparing Obama to Mikhail Gorbachev. Moribund economy, social system on it's life-support, even war in Afghanistan and then the high hopes raised by a brash young reformer.
Cartoonist Ted Rall took this tack as early as last July
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And check out this Idleworm post in the same vein; All Hail Comrade Obamachev
Then again some of the reaction to Obama is just weird. Like this Japanese action figure for example;
And the less said about this, the better....