As of today (29th November 2007), Ubuntu's next big release, Ubuntu Hardy Heron 8.04, which will be a Long Term Support release, just like Ubuntu 6.06 LTS, I've noticed a milestone announcement about it. It contains 9 blueprints and about 32 targetted bugs for now.
Ubuntu developers have expressed their desire to focus more on fixing the bugs of the applications that are already contained in Ubuntu, rather than reviewing new applications and their updated versions - thumbs up for that decision!
The tracker search tool will be reviewed, OpenOffice.org suite will also get its bugs fixed by April 2008 (the expected month of release), same stands for several other important applications. Let's hope there will be more in that list :-)