Asking Linux users to use the Windows version of Sketch Up in Wine is a slap in the face. Many Linux users came to Linux as Windows refugees, tired of putting up with substandard applications on a substandard operating system. Now you want to ask Linux users to run a Windows version of Sketch Up? Even Google has abandoned using Microsoft products, because of it's inferiority.
C'mon Google! Support the OS that you have chosen to support all of your online applications ... Linux! Release a Linux version of Google Sketch Up.