Macbook Pro doesn't connect to router anymore...

My macbook was connected to our wireless network with no problems at all. Yesterday it wouldn't connect anymore, yet everyone else (who have wireless macs too on our network) had no problems at all. I'm pretty sure I get assigned an IP address from the router, and I can see all the other networks that are available, I just can't get connected to the internet. What happened? Is this a hardware issue or something with the router?

Linksys WRT54GL Wireless
Connected wirelessly
Cable Modem
IP address 192.168.1.101
Subnet mask: 255.255.255.0
routher 192.168.1.1
when i would pick the network before, it would load, i'd join, and i'd have internet. then the internet failed only on my computer, but i could still get an IP from the router, but i couldn't connect to the net.
i just rebooted after last trying and it's working now. maybe it overheated? maybe too many people were on the router?
well, if i continue to get this problem i'll repost.

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Macbook Pro doesn't connect to router anymore...

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