I've been having this problem for awhile where my wifi signal either stops working or disconnects completely from one of my many wireless devices.
I have 2 pcs (1 is connected through Ethernet), a ps3, one printer, 3 ipads, 6 phones and 4 ipods that are all trying to connect through the same router. (Linksys WRT54G) I also have 4 tvs hooked on cable through the same modem. I'm not sure if this is a problem because all my devices are trying to connect at the same time or its just because I need a new router/modem.
I also have a second router that is not in use but could be used as a netwrok bridge, but I'm not exactly positive how to set one up. This one is a NetgearWNDR3700v3. I also don't know if a bridege would help because I can get connection everywhere in the house, just not on all of my devices at the same time.
Read more: Why is my internet not working?