Google has just put online over 20 years of archives of the Usenet discussion system network. I've just had a search through the archives to find the first mention of Jamiroquai which was posted to the rec.music.funky group on the 16 November 1992 by Palle Zetterstrand from Sweden, a month after the release of When You Gonna Learn on Acid Jazz. This I believe is quite possibly the first mention of the word Jamiroquai on the Internet and he was quite right when he said "The 12" of the year has arrived."
Around this time in May 2000, bidding on the Mini website for a Jamiroquai customised Mini car finished with the winner driving away in a bit of mini-jamiro-history for just over 14,000 pounds (UK).