I am interested in getting a wireless adapter for my desktop to periodically hop onto ambient unsecured wireless signals to check my email. I'm wondering which make and type will work best, a PCI wireless network adapter or a USB wireless network adapter. Maybe there is no difference, but if there is I'd like to know about it. My roommate has a notebook computer and with it she finds we are in range of about six wireless networks, but all show a low or very low signal strength. So I'd be interested in an adapter that will be best at picking up these low-strength signals. Most of the networks within range appear to be Linksys. I guess that means I should probably go witrh a Linksys product to maximize the possibility of picking up the signals.