"For I dipped into the Future,
far as human eye could see;
saw the vision of the world,
and all the wonder that would be." -Alfred, Lord Tennyson
This weekend, the Sun is shining here in Portland, as we've gotten our first annual spell of warm, sunny days recently. It's got me thinking of the approaching summer, and one of my favorite music festivals that's coming up. One of the great groups I'm looking forward to is Keller and the Keels, who have an unparalleled penchant for amazing bluegrass mashups, such as their rendition of two very different songs by Beck/The Grateful Dead artistically…