Just got a PS3...

[reiella]

Part of the problem is going to be the wireless network that you're using.

The PS3 itself is going to be limited to g wireless, it'll constrain your broadband speeds down to the g wireless network speeds. Which can be noticable .

Also, your wireless router may just be a b router, which would constrain your speed even further.

If ya can share the model of the router, can prolly give ya more effective advice/expectations . There are repeaters available though as others said, if your network is being limited by distance [and going through floors tends to seriously reduce the effective range of wireless routers].