Piano Musings is a neat little site that understands its strengths, and sticks to them. Its full of little nuggets of wisdom about sitting down at the keyboard, using chords, and letting the dream of music flow through your hands. A rather scary thought for most classical musicians, as improvisation is a bygone ideal these days. Always remember - Bach, Beethoven, and Mozart were all reknowned impromptu performers, the music constantly lived and sought expression.
A beautiful site, here