I was wondering if you had to own the WD to use the rules ..say the storm tallon ..or if the rules for the stormtallen can be found on gamesworkshop.com someplace
I would say no you don't need to own a copy of the June 2012 WD, especially since it sold out within days of release and even the ebay types have sold their overpriced copies. My logic is this:
The rules for the Stormtalon are in the 5th edition Space Marine Codex (albeit NOT the printed version). As long as you own any 5th edition copy of the codex (i.e. the paper one), you are entitled to use the Stormtalon model. You can get the rules for it as I did by calling the Games Workshop support line and they will tell you them verbally over the phone (yes it's tedious). Hypothetically one could also obtain the rules off of the Internet by using search tools such as google, but doing so would be a violation of GW copyright by you and/or the person publishing them (depending upon the format they chose to publish said rules).
Once again, GW hasn't thought through the implications of limiting the means of obtaining the rules for this model. If they think that every SM player is going to buy an iPad and the electronic codex just to be able to use this one model between now and when the next paper SM codex comes out, they're crazy. I'm guessing it's even worse for Ork players wanting to use the three new flyers they have out as there is no e-book version of the current Ork codex. Go figure.