Okay, so here's what's been going on.
About a month ago, a storm knocked out my internet, and forced me to get a new router. It came in about 3 days, and I entered all the new information on router over to my PS3. It worked fine for about 3 days, and then I noticed that my PS3 would not sign in whatsoever. I've been trying for the last month to connect, but everytime I enter my stuff in Network Settings, and I do a connection test, it says "Failed to obtain IP address"
Any help would be appreciated, as this is really stressful. I can go a month without online PSN, but more than that and it's too much.
Here are a few support articles that could help:
Connect the PlayStation 3 to the Internet
Troubleshoot Wireless Network Connection
Troubleshoot Wired Network Connection Problem on PS3