The Japanese Blog Ichie-inc (translation here) posted a first 20mm pancake lens test. They compared the performance of the lens with the “older” 16mm pancake. It’s up to you to comment if the 20mm lens is better than the 16mm or not :)
The lens will ship in April in EU and US countries (April 10 according to BHphoto).
The more expensive and certainly better performing 50mm f/1.4 Zeiss A-mount lens will ship from very late may only. Preorders are up at Amazon (Click here), Adorama (Click here), BHphoto (Click here) and SonyStore USA (via AlphaCameraDeals). In Europe at Wex UK and Amazon DE.