Welcome! I applaud your decision to embrace hostile terminology. I don't think you should feel any obligation to bring up your religious beliefs all the time.
If you're interested in the interactions between unashamedly traditionalist religion and rationalism, you might want to drop into the ongoing discussion of talking snakes. Most of it lately, though, has been discussion between people who agree that the story in question is almost certainly hopelessly wrong and disagree about exactly which bits of it offer most evidence against the religion(s) it's a part of, which you might find merely annoying...
[EDITED to add: Aha, I see you've already found that. My apologies for not having noticed that you were already participating actively there.]
Just out of curiosity (and you should feel free not to answer), how "typically fundamentalist" are your positions? E.g., are you a young-earth creationist, do you believe that a large fraction of the human race is likely to spend eternity in torment, do you believe in "verbal plenary inspiration" of the Christian scriptures, etc.?
(Meta-note that in a better world would be unnecessary: it happens that one disgruntled LessWronger has taken to downvoting almost everything I post, sometimes several times by means of sockpuppets. I mention this only so that if you see this comment sitting there with a negative score you don't take it to mean that the LW community generally disapproves of my welcoming you or disagrees with what I said above.)
Fairly typically fundamentalist, I believe in young earth creationism with a roughly estimated confidence level of 70%, a large fraction of the human race destined for eternal torment at about 85% and verbal plenary inspiration at about 90%.
I'm a little more theologically engaged then average but (as is typical in my circles) that mean's I'm more theologically conservative, not less.
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A note for theists: you will find the Less Wrong community to be predominantly atheist, though not completely so, and most of us are genuinely respectful of religious people who keep the usual community norms. It's worth saying that we might think religion is off-topic in some places where you think it's on-topic, so be thoughtful about where and how you start explicitly talking about it; some of us are happy to talk about religion, some of us aren't interested. Bear in mind that many of us really, truly have given full consideration to theistic claims and found them to be false, so starting with the most common arguments is pretty likely just to annoy people. Anyhow, it's absolutely OK to mention that you're religious in your welcome post and to invite a discussion there.
A list of some posts that are pretty awesome
I recommend the major sequences to everybody, but I realize how daunting they look at first. So for purposes of immediate gratification, the following posts are particularly interesting/illuminating/provocative and don't require any previous reading:
More suggestions are welcome! Or just check out the top-rated posts from the history of Less Wrong. Most posts at +50 or more are well worth your time.
Welcome to Less Wrong, and we look forward to hearing from you throughout the site!
Once a post gets over 500 comments, the site stops showing them all by default. If this post has 500 comments and you have 20 karma, please do start the next welcome post; a new post is a good perennial way to encourage newcomers and lurkers to introduce themselves. (Step-by-step, foolproof instructions here; takes <180seconds.)
If there's anything I should add or update on this post (especially broken links), please send me a private message—I may not notice a comment on the post.
Finally, a big thank you to everyone that helped write this post via its predecessors!