The beginning of 2008 curiosity!

Hi everyone - I'm just starting to get to grips with 2008 for a client with no prior training so learning on the go! I'll be sending lots of 2008 questions over the next week so beware! Hopefully they will be useful to all!! Here goes...
In activity monitor:
1) where is blocekd processes visually displayed - in previous version you could see a red cross?
2) what is the criteria for displaying the recent expensive queries?
thanks!