Good stuff. Looks great, content is good, and it's a very targeted niche.
The tips for building links are the one's you already have. Time consuming, but they work. I'd also recommend Bookmarking Demon
. It's currently undergoing an update, and isn't as effective as it once was, but all those that own Bookmarking Demon version 3, get the version 4 upgrade for free. It'll save you $100 or so to buy it now, and BMD 4 is due out in days. It's simply the best tool on the market for automated link building.