Not Sony only but also Samyang is rumored to announce new E-mount lenses in September. These will support AF and electornic aperture control. For now Samyang released one manual lens only, the cheap and nice Samyang/Rokinon fisheye lens that got reviewed by two well known testers:
Kurtmunger: “The Rokinon 8mm F/2.8 fisheye lens performs superbly; there’s nothing negative to say about it other than sun flare is strong at times, but that may enhance your image depending on the feeling you want to present to the viewer”
ePhotozine: “The exceptionally low price of £270 for the performance this lens delivers makes this lens a simple choice for those in the market for a fisheye lens for their Sony NEX”
I like Rokinon/Samyang lenses a lot and I recommend you the following two lenses for Alpha mount:
1) The 35mm f/1.4: In US you can find it as Rokinon at Amazon (Click here), Adorama (Click here), BHphoto (Click here) and on eBay (Click here). In Europe the name is Samyang and you can find it on eBay (Click here) and with the name Wallimex again on eBay (Click here).
2) The 85mm f/1.4: You can get for $274 on Amazon (Click here), branded with the name Rokinon on eBay (Click here) and branded with the name Samyang on eBay (Click here).