First time poster, long time lurker. I will soon order the ImacG5 20". I cannot decide on a few options. 1. Blue tooth--does it interfere with 2.4 ghz cordless phones? 2. Is there anyway to order a two button scrollmouse and not even pay for the mouse that I don't want? Do you even use two buttons with a mac? 3. I am not interest in pda/cell phone connectivity. Is there any other reason to get blue tooth? 4. Airport extreme is just wireless networking, right? I don't have a need to network at all. Anything that I cannot add later that I might regret? Thank you.