Will U3 live on? If not, has something replaced it?

This PortableApp.com thread might interest you:

http://portableapps.com/node/26328

especially the 5th posting as well as this thread:

http://forums.sandisk.com/t5/Cruzer-flash-drives-Solid-State/U3-COM-What-s-up-with-U3-Website/m-p/185386/highlight/true#M12

:)