Hi all, does anyone know what they are or link to the wireless lan adapters?

As in...

You got a very expensive wired router and do not want to ditch for a wireless but liking wireless use on laptop. I got a pc with mobo with wifi but pc needs to be on for others to use the wifi but odd thing with that is when traffic is busy if someone on the net the wireless mouse goes nuts.

I would like and have seen I think the wireless boxes that plug into a lan port into a router or switch that lets you connect wireless into that network/router etc.

Seen them for the old xbox that plugged into it.

I just need one that can hook up to the network and transmit, the wireless devices would be my ipod touch, notebook, another notebook, psp

Any access point should do this.

http://en.wikipedia.org/wiki/Wireless_access_point

you could kill 2 birds with stone by setting up some sort of NAS drive?

I have http://www.laptopsdirect.co.uk/ASUS-Wireless-Access-Point-and-2.5-Inch-Hard-Drive-Enclosure-WL-HDD2.5/version.asp

which allows what you want + the added bonus of a 24/7 share ;-)