Widgetbucks ========== i) innovative ads ii) slow loading ads iii) low impressions because of ii) iv) better ctr v) high cpc vi) works only on close niche sites related to shopping vii) very new in market so in future they might do some blunders Adsense ======= i) nearly 100% fill rate for all kind of niches (known to me) ii) blend able ads iii) reporting is quite right most of the time iv) works less good in shopping related site compared with affiliate ads. Decision is up to you!!!
Widgetbucks looks nice, but I also haven't tried it. I would have jumped in with both feet but all your posts about questional payment ethics no doubt has me concerned.
AdSense. I really think in all but 0.01% of cases AdSense is going to be the better choice over any of these alternative ad networks. There may be some cases (extremely high low click traffic) that AdBrite ***NOT WidgetBucks/AuctionAds/ShoppingAds*** could make you more money but in general I would stick with AdSense when it comes to ad networks and move on to other business.
widgetbucks is NOT for everyone. It is product based and will do good on product/reviews site. Also as people said, they still have not paid yet and there might be some possibility that they further refine(final audit) the clicks reducing the revenue of webmasters. So instead of removing adsense and using widgetbucks, you may like to wait for few weeks. Lets see what happens.