> be0: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>         media: Ethernet 100baseTX (10baseT half-duplex)
>         status: no carrier
> 
> Why does it still say "(10baseT half-duplex)" in parantheses, and why does
> the status always say "no carrier", though the network is up?

A coding error in the driver; this is fixed in -current.

> Also, is the funny klicking from some relais(?) on the card normal when
> running ifconfig?

It's an electro-mechanical device..  The internal transceiver is switched
on amd off by a relay.