I have to admit im not as savy on Wireless ROuters as id like to be.

Is there a limit to what a wireless router can handle?

I keep getting random wireless devices that lose there connection, then i have to re-enter the WEP key half a dozen times to get it to accpet.

Im using a Linksys Wireless G and i know its not the newest but it works, i think lol.
Is there a better one i should look into getting?
Is there a limit to how many devices you can use on it at once?

We have
3 laptops
1 I Pad2
2 IPhone 4s
DVD player

All on wireless.