[jmatthew3]

Just to add - split testing your adsense can really be a big deal. For something this small, you probably don't need to split test the colors. But, the ad placement (and which ad units to use) can make a HUGE difference. I like to select a few different formats, make adsense "channels" and then weighted-randomly select one of my splits. In other words, keep testing, but display the combination of ad units that works the best, more often. Start off at even, then revisit things 6 months from now, tweak, revisit in another 6 months.

[wtracy]

This is the first time I've seen someone suggest split testing the ads that run on their own site. Are there any particular resources that you would recommend for this?

[bemmu]

It's not too difficult. Suppose you have a 728x90 and 300x250 and want to see if a 160x600 would be better than the 300x250 unit. Create four new ads. 728x90 channel a1, 728x90 channel b1, 300x250 channel a2 and 160x600 channel b2. On your website half the time show a1, a2. Half b1, b2. Later go to AdSense and view stats by channel and see which made more.