What pain? Do wireless devices connect to router and are assigned an IP? But they do not connect to the Internet?
Do a "IPCONFIG /all" in a Command window and post here.
What does the Status of the Local Network/Attached Devices show?
Is the router's DHCP turned on?
Is the router's Wireless Network turned on? What wireless protocol (802.11 B, G, and/or N) is it using and is that compatible with the devices?
have you tried different wireless Channels?
You are advised to use WPA2 Security with a difficult Key.
Perhaps post the Wireless Network settings, hiding any keys or passwords.
I could go on & on, but networking is such a pain
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU BB => 2010: Orange 16 Meg LLU BB