Piggyback a Happiness website onto my journal

This might take a bit of time but I don’t expect it to be all that technically difficult. I already know how to use LJ’s scripting language to piggyback custom pages onto my journal. I suppose I could just host a site on my own server, but I think this idea will make it easier to dynamically pull my LJ posts tagged with ‘happiness’ and ‘my happiness project’ onto the page, along with the static content.