Amazon (UK) has the Japanese release (including bonus tracks) of Dynamite available for pre-order. Comparing total prices including shipping to the UK (apologies to all the non UK readers!), buying from Amazon is around £6 less than direct from HMV.co.jp. Amazon.co.uk currently has the release date listed as 11 May, although this is almost certainly a mistake.
Jamiroquai's first single release on the S2 label, When You Gonna Learn?, was released in the UK today in 1993. Supersonic, the second single to be taken from Synkronized, was released today in the UK in 1999.