I am thinking of doing a World Tour

I was planning of doing a world tour[link widoczny dla zalogowanych]. Thinking of touching about 20-25 countries.
Anyone has any ideas of any good deals going on for the world pass kind of air tickets. I had read long time back of a deal where for $3000 [link widoczny dla zalogowanych]you get to touch any 20 destinations and you have 1 year to do that.
Anyone has any idea for such deals going on? Please post info, links, etc.
I [link widoczny dla zalogowanych] soon so please post any info you know about.