There are many more in recent years than in the classic era, but part of that is that there weren't that many Star Wars games back in the classic era. I found this site that has several available for download... Some I've already listed, but many more can be found here... http://gameads.gamepressure.com/tv_games_commercials.asp?SEARCH=Star+Wars
The dates aren't on the site, but I'm going by the release date of the games as listed on www.gamefaqs.com, so the dates could be off slightly.

Star Wars (NES) (1991)
Star Wars Episode III (Multisystem) (5 different spots) (2005)
Star Wars Episode III (XBox) (2005)
Star Wars Empire at War (PC) (2006)
Star Wars Battlefront II (Multisystem) (UK) (2005)
Lego Star Wars (3 spots) (2005)
Star Wars Galaxies (2 spots) (2005)
Star Wars Battlefront (3 spots) (2004)
Star Wars Rouge Squadron III:Rebel Strike (4 Spots)(GC) (2003)
Star Wars Knights of the Old Republic (XBox) (2003)
Star Wars Jedi Starfighter (PS2) (2002)
Star Wars Bounty Hunter (2 Spots) (2002)
Star Wars Episode I Racer (N64) (1999)
Star Wars Rouge Squadron II: Rouge Leader (GC) (2001)

I also have some scans of print ads for several Star Wars games, mostly from the Atari 2600/5200 era, if you are interested.