Production group Fanatix, who consist of BBC Radio 1Xtra's Aaron Ross and Ministry of Sound's Neil Pearce have recently completed remixes of Dynamite and Electric Mistress.
The remix of Dynamite, which I think is pretty good indeed was broadcast on Aaron's Soulful House show on BBC Radio 1Xtra last week. A rip of this remix from the radio station online stream is now available on the downloads page.
I've not heard (or found) the remix of Electric Mistress yet but I do know that it exists out there on a CDR.
According to the Aaron Ross website, both remixes are being done for Sony - which means that they may find themselves onto an official Jamiroquai release at some point, and not just white label vinyl.