Installing and running SketchUp 7 under Wine works quite well with Ubuntu Lucid. But, not out of the box:
- You'll probably need to do the registry hack (and/or others) described on WineHQ's wiki to get it to start.
- Scrolling through the list of templates doesn't work but you can browse and select one in the standard file browser dialog.
What almost made me walk away from it was that the keyboard shortcuts (e.g. O for orbit and C for circle) weren't working. In order to fix that, I had to go to Window > Preferences > Shortcuts and click Reset All.