U3 replacement?

USB Flash Drives All other USB Flash Drives
2

If you still have U3 capability this thread may interest you: 

http://forums.sandisk.com/t5/All-SanDisk-USB-Flash-Drives/U3-COM-What-s-up-with-U3-Website/m-p/185386/highlight/true

If you no longer have a U3 USB drive but want portablity this link will interest you:

http://portableapps.com/platform/features