only 1 ethernet outlet, how to share it with Blu-ray player, HD DVR, and PS3?

[quitemouse]

thanks for all the replies...

so I can just get a simple 4-port switch and all my devices will work
easily, no? I mean I don't have to configure some setting inside the
router and/or switch...

Come to think of it, is there a router that has more than 4 ports?
My current router only has 4. (3 ports used in the same room, with
the other one extended to the basement for the BR player/HD DVR/PS3)
Is there maybe a 6 or 8 port router? Will that be a better solution than
a 4-port router + a 4-port switch?(which mean I only end up with 7
available ports)

thanks again!