This isn't a very "original" idea, but I've become big into blogging on blogspot.com. All my friends and family read it and when I meet someone knew it's easy to just say " Hey, check out my blog." Mine isn't especially made for gospel thoughts or ideas but it shows a peak into my LDS lifestyle. I've met a few others on this site that have blogs and one has one where she does only write spiritual and gospel oriented ideas, thoughts and activities.
I think it's effective because when people hear about our religion, it's easy for them to focus on rumors, wierd stories, goofy teachings, ect., rather than seeing the kind of people and their way of life that keeps them genuenly happy. Blogs can promote family centered lives and you can add links onto your page that will take viewers to places such as lds.net, lds.org, ect., and I've found that people actually DO use the links you put on your page whether it be from boredom or curiosity.
So there's my idea!
PS-Blogs don't have to be intrucive in any way you are not required to give any information you don't want out in the open.