I did my first serious thunderbolt transfer yesterday and was surprised by how warm the connector ends on the cable got. You could definitely tell there was something going on in there.
I also discovered that Apple's FW800/TB adapter is bi-directional. This is uncommon for active adapters. I can use it to attach a macbook pro in target model to a powerbook g4 via fw/tb adapter and fw800 cable (treating the TB end as the peripheral end of the adapter) as well as to connect to a fw external HDD from a macbook air via it's TB port. (treating the FW end as the peripheral end of the adapter)
