3.0 will probably be released next month. There are still a couple of projects that are not complete, like using 19 instead of 6 inner ultrapeer connections (while reducing ttl from 6 to 4), using qrp for ultrapeer connections, improved firewall detection, vendor messages. - I'm not sure about magnet links will be ready in the next version... but I hope so. The GUESS implementation is already working in the development version (well it has been working more or less for about two months now).