"BMW is currently working on a replacement for the Z4 Roadster. Codenamed E89, the new Z4 will be a conventional soft-top and will come as a competitor for the next generation Porsche Boxster and Mercedes SLK-Class. It will be priced somewhere around $40.000. .."
This is from a preview article on the 2009 BMW Z4. You can find info about it's design, performance and price, and also some artist's impression pictures with the car.
Read the whole article here:
http://www.topspeed.com/bmw/bmw-z4-ar28427.html