Good to see this campaign evolve into ideas specifically tailored for a banner campaign
The only suggestion is that, this ad could have platform targeting enabled - therefore as a Mac user I could be seeing a different execution? Or even go one step further with specific targeting for the various windows flavours - 95, XP etc..
Note : This had a rollover for sound prompt, unfortunately I've had to reconstruct the bits of the banner I captured in order to post it. The 'best practice' was there people, I just removed it for the sake of getting it on here for all to see :)