The chinese blog Xitek posted the first image samples taken with the “Lens Turbo” adpater. You can see them here: Xitek-1, Xitek_2, Xitek_3. These have been taken with the Pentax 40mm f/2.8 lens (here on eBay). The “Lens Turbo” is the chinese clone of the popular and twice as expensive “Speed Booster”. The Lens Turbo will be sold on eBay from May and I will let you know when the first sales will be online. Or if you use Slidoo save this search to get notified when there will be Lens Turbo eBay auctions (Click here and if required change country in settings). The price will be $249.
One more news: First Speed Boosters are for sale via UK store on eBay (Click here).