Quite good... The 468x60 looks like an advert but the 250x250 one doesn't. At first sight i thought you were only using 1 adspot, on a second look i found the other ad (250x250) xD Maybe you can try and add another 250x250 next to it? maybe i'll increase revenue?
Seems to be good ! Other than that you can also add link ads on right sidebar of your blog just below ADVERTISING. - Digital -