I'm also using AOL Silver. They supplied a free wireless router (Speedtouch 585) and this came complete with dedicated AOL software which creates the login information for your AOL screen name.The router logs in to that user account each time. However, once the router has logged on (automatically, after the setup program is completed) and the wireless network is running then, as far as I am aware, several computers can access the network simultaneously - but this is via the original screen name account. So, under this screen name, several users can be online at the same time.
Here, we access the internet via the main computer and a laptop at the same time with no problems.
The AOL software only supports certain routers - check on AOL website for more information. Other routers may involve different setup procedures.
I've found AOL Silver very reliable.