Yup, you can pass current through USB. So… you can light them up!
These Cable to Go ones go for between $ 2.38 – $ 9.59 depending on colour and length (look around a bit for different lengths than 2m
These green, blue and red gold plated connectors aren’t too expensive either.
These go for around $12.99
This pack of 7 port aluminium hub and 5 cables goes for $51.99
There are more possibilities with flashing heads when data is transmitted through them, with different colours at either ends, etc etc…
But you may have realised: the cable itself isn’t illuminated! AFAIK there is only one manufacturer for cables like that:
The Soundtech Lightsnakes
They can be found for around $20,- – $30,-