Looking for some really well executed dashboards out there, specifically for web.
Rather than look at examples of other people's dashboards, I would urge you to take a look was to what a good dashboard means for you and your product.
Some good reading on this subject would be Visual Display of Quantitive Information by Edward Tufte and Information Dashboard Design by Stephen Few.
Also if a dashboard is even needed. I hate it when companies just vomit charts at the user.
Only slightly related, but at my previous job, we had a bunch of huge monitors in multiple areas of the office with totally meaningless data on them.
It was the most 'a dashboard for the sake of having a dashboard' thing I've ever seen, to the point where at least one of the metrics displayed never changed. It was 100% static.
Ha you totally beat me to it. The latest Mixpanel iOS stuff is exceptionally nice: https://dribbble.com/shots/2491183-Mixpanel-iOS-iPhone-App
It's not so much about how it looks, but rather about what information the company you are working with needs to display and what clever/useful ways you can find to display it.
https://www.geckoboard.com/ is both a good Dashboard SaaS but also have some good resources about how a organization can benefit from using a dashboard.
As others already have said, a dashboards succes is not measured in the UI/UX but in the data showned.
Take a look at this article. This is was the winner of a dashboard design competition hosted by Stephen Few.