Whats the deal?

Eh, my bad. It depends on how much traffic is transmitted in your wireless network. All the wireless hacks need to capture packets to analyze. If you have lots of wireless activity, it will be cracked in a short time; if you don't, then it will take longer.

Connect it to a lan port? are you suggesting i use the wireless router i buy as a repeater or something, when i could just use the router as a router?

I have never used 3rd party software on a router what are the benefits?

thanks for your suggestions

That device you have is a modem+router all-in-one. I was assuming you're using it as such. So I recommended that you get a router-only device to use for wired/wireless networking. (So you still need a modem: you could turn off wireless on that dynalink device and use it as a modem only or it might have a modem-only setting, or you need another device that's just a modem.)

As for third-party router firmware, I gave a list of what users of such firmware commonly think the benefits are -- most of its benefits are probably due to it using Linux under the hood. I suppose I should list some cons as well for balance: almost always will void warranty, you might brick the router (i.e., make it unusable/broken), hardware support (not an issue if you research and buy a device that will work). If you still want to consider going this route, you should well research it first.

To get you started,
Here's DD-WRT's wiki: http://www.dd-wrt.com/wiki/index.php/Main_Page
Wikibooks entry about the Tomato firmware: http://en.wikibooks.org/wiki/Tomato_Firmware