My friend Guy D2 just released a really nice Dashboard Widget for web developers — SeeSS gives you instant access to “all CSS1 & CSS2 (and some CSS3) properties with their values, examples, descriptions and other valuable info.”
After the initial “Wow!” factor of Dashboard wears off, you quickly start to separate the wheat from the chaff and pare down the collection. This is the kind of thing Dashboard was made for – useful info at your fingertips. I liked the distinction made between Dashboard and Spotlight made back at WWDC:
Spotlight – Find Stuff
Dashboard – Find Out Stuff
Though truth be known, 99% of my Dashboard use can be boiled down to punching F12 as I get out of the shower to see whether I can wear shorts to work.