According to one of the Channel 4 press team on Twitter, they are putting up massive lit up billboards around the UK from Monday, so it looks like they're going all out to promote the final series.
When was the last time they had billboards to promote BB? Must be a good 5 years or so.
The "lit up billboards" thing sounds like what The X Factor did last year, if anyone remembers.
Edit 7:45pm: Here's a pic of one of the tube posters from Warren St. Station!:
