http://www.osalt.com/ has a list of most-requested commercial windows apps, currently:
1. Visio 2. Norton Ghost 3. Photoshop 4. Nero Burning Rom 5. Dreamweaver 6. AutoCAD 7. Illustrator 8. Access 9. Premiere Pro 10. ACDSee
No idea how they generated that list, but it seems somewhat reasonable. cc'ing them in case they feel like commenting on where that list comes from and what it means. (And no, I don't think Ghost will ever run on Wine :-) - Dan