I'm always looking for self-powered, very small form factor USB hubs that I can jam into a housing with the raspi.  This post is intended to be a collection of some of the more interesting ones I discover.

This is the NZXT IU01, which is a bareboard USB hub with 6 'internal' connectors.  These internal connectors are useful because they can be broken out with standard PC front panel USB connectors to permit mounting external USB ports on an enclosure.  USB ports mounted on an enclosure are considerably more rugged than USB ports directly on the board, as damage would be limited to the connector and not potentially the controller PCB.

NZXT IU01 Internal USB Hub [IU01]