When my laptop (Acer Aspire 9300) is plugged into the wall for power, I lose my
wireless connection instantly. I remove the power plug and my wireless
connection comes back. I've tried a couple of things, reboot, reload
the drivers, all with no help. When I'm running on batteries, I can
see my wireless connection along with others from all my neighbors, but
if I plug in the power, they all disappear and I see nothing.... I
even plugged my laptop in 2 to 3 feet from my wireless router and
still nothing unless I remove power.

Anyone ever seen a problem like this? Any ideas would be greatly
appreciated, as its getting old only being able to surf the net for an
hour at a time while running on my battery.

Someone posted this exact problem a little while back. I will see if I can find the post and let you know. I forget what the outcome was now.

your power adaptor should have an RFI filter inline on the AC cord --
see the attached.

if not; get an adaptor that does.