So I've had a Dell TrueMobile 2300 router for some time.  As far as features go, its pretty good considering what I paid for it a few years ago.  But its been a bit flaky for at least the last year and my change to WPA security made it worse. Then I saw a LifeHacker post that said, "upgrade your $60 router to a $600 router for free".  And that's by far the best way I can describe what they pointed me to.

But a few things to note:
1. First make sure your router is supported.  If its not... then spend the $30 to get one that is!
2. Realize that this is not for the novice.  You screw this up , you will break your router.  It will become unrecoverable.

The way this works is you replace the 'firmware' <read: the software on the router> with DD-WRT a free Linux based software package that has a TON OF FEATURES.  I mean if you want it on your router, this gives it to you.  So if you are a brave soul, go upgrade! 

And by the way, once I did this my router has been performing like a champ.  Absolutely no issues with connectivity since the upgrade.