I've been a big fan of the Moogerfooger effects units, so you can imagine my excitement at the release of the Moogerfooger MF-4'33". There's simply no better way to improve the sound of an electric guitar than feeding it through this unit: dig that "pure warm analog silence." Really, guitarists: this is the single best thing you can do for your sound. (Sorry; I promise next week, I'll stick to viola jokes)

US$433.00 and available only through April 1, but can you put a price
on silence? Analog silence really does sound better than digital.

(via Music Thing, which points out that Bob Moog was there for the infamous Cage premiere — no foolin'.)