We saw the JP-08 here. The full line of new Roland Boutique mini synths have been leaked. The source as far as I can tell was Zzounds via Google cache: JP-08 ($399), JU-6 ($299), JX-03 ($299), K-25M ($99).
The first thing to note is the mini keyboards on these are optional. They are all desktop synths and the front panel can be angled to different degrees including flat when mounted to the keyboard. Each is a four voice synth but can be chained to add an additional 4 voices per unit. Each can run on batteries and has a built-in speaker. The keyboard is purchased separately. Details and pics on each follow.

The legendary Jupiter-8 synth is back - as a limited-edition module no bigger than a book. Part of the Roland Boutique series, the JP-08 is all about hands-on control and that iconic Jupiter sound. With an array of 36 knobs and sliders from the original Jupiter-8 front panel, the 4-voice JP-08 is highly programmable and encourages sonic experimentation, especially with the built-in speaker and battery operation. Using Roland's acclaimed Analog Circuit Behavior (ACB) technology the JP-08 faithfully reproduces the original Jupiter-8 sounds and adds a few new twists in the form of extra LFOs and expanded VCO range. You can even slide the JP-08 into the K-25m keyboard unit (not included) for a self-contained, go-anywhere synth experience.

The Jupiter-8 was a big synth in every way; physically imposing with loads of knobs and sliders, and most importantly, a huge sound. The JP-08 retains the big sound of the Jupiter-8 but shrinks everything else - including the price - into a module measuring under 12" across.

With such an expressive sound engine, you'll want to shape the sounds to match your mood. With 36 of the original parameters accessible from the front panel, the JP-08 is all about hands-on control, and even users of the Jupiter-8 will quickly feel at home as the user interface and programming 'feel' is highly reminiscent of the original.

Even though the JP-08 is an authentic recreation of the Jupiter-8, Roland also included a few extras. The JP-08 adds several new waveforms to the original architecture, including TRI and NOISE for the LFO and SIN for VCO-1, and both VCOs have an expanded range for even more sound shaping potential.