Very nice.. I like your design.. Colors are very good.. I do wish it were a little larger.. If you render at a larger size, and then reduce to the size you want, it will smooth out some of the edges.. When visitors come loooking for desktop wallpaper, they usually filter out sizes too small for their monitor.. If you render and upload at a larger size, then many more people will have a chance to see your work..
I agree with the others, that a larger sicze would be great but other than that I lik this image very much. It reminds me of an eye of maybe an elven woddland goddess or something!! The outside petterning is definatly very leaf-like, or feather like - like a mother bird craddling her precious egg. I like the colours you have used - very soothing and calm, just varied anohter not to be too sterile and boring, but not other the top and widly over coloured. Good job - 8/10 from me, not a 10 only because of it only being available in the smaller size.