For Mac users who need to run windows (who am I to judge? :-P) VMWare Fusion 4 is out, with Lion support. Usually US$79 but they're offering an introductory price of US$49.99 - and extra 20% off with code FUSION20.
Won't discuss the pros and cons between this or Parallels, but the way I see it this deal makes it much cheaper than Parallels (even the Student edition, which is $60).
I havent use it with lion yet, but I used to have a win7 bootcamp partition before changing to a SSD in my MBP, It was a real boon being able to run winblows apps without rebooting into bootcamp.