It isn't often that developers unveil their cards, but when they do, their user's ears typically perk up. Such is the case with Dave Watanabe's release of Xtorrent 1.0 v40 in which he announced two big new features now, and a few juicy ones coming down the road. As of this new version, Xtorrent Pro (the registered version) offers per-torrent bandwidth limits and support for the Azureus/utorrent compatible peer exchange, which should apparently help increase some transfer speeds.
Using his crystal ball, however, Watanabe also announced three major features we can strike off the request list: selective file downloading, encryption, and torrentcast auto-downloading (though I should point out that Xtorrent can already subscribe to RSS feeds of torrents - it just doesn't auto-snag 'em yet). Dave announced that these features are "absolutely" planned for a future release (or spread out across more than one), though we'll all just have to sit tight as these things naturally fall under the tried and true "they'll be done when they're done" policy.