Bob Somers has created a Wii drum machine.

You can control your own drum machine with the Wii Remote and a few software programs for your Windows PC.
Getting this working is still pretty complex. You need the latest version of .Net and you need to get your remote working with GlovePIE. Details are available at [...]

Infinite Horizon is described as a non-deterministic trance project. It’s a box that automatically generates formulaic trance music (MP3).

From the site:
This neat little box was the culmination of my major in Computer Music at CNMA (what was then ACAT). I had demonstrated using SuperCollider that a non-deterministic sequencer was capable of creating contemporary dance [...]

Not everyone looks at a vacuum cleaner and “I’m going to turn that mother into a monophonic synthesizer!”
Luckily, Tod E. Kurt thinks different.
Kurt has created RoombaMidi, a Mac OS X application that creates turns the iRobot Roomba roboti vacuum into a MIDI instrument for use by any Mac OS X MIDI sequencer, like Ableton Live, [...]

The Cano Sonosaur is making the rounds of music blogs. It’s a DIY partial kit for creating an inexpensive bass synth.

Here’s the description:
My newest synthesizer, “Sonosaur”, has most of the features of (and sounds similar to) my Saurus synthesizer, but has pots in lieu of the Saurus programmable presets. It’s great for real-time knob-twisting. It’s [...]