The following information was from 19\06\2011 and is now outdated:
Since the forum gods have deemed my previous post worth eating with 502 Bad Gateway errors I am afraid everyone will have to do with this brief summary version of what I wrote instead.
Mix and Match Wargear
Something which I personally love about playing the rough alpha build is the ability to mix and match melee and ranged weaponry together to make countless weapon combinations for melee troops. Want a chainsword with plasma pistol? You can do that! Want a chainsword with a bolt pistol? You can do that too! As a matter of fact some troops in the Dark Angels faction currently have up to four different Codex approved melee and ranged weapons to combine together, giving an interesting 16+ weapon combinations to have your troops wield.
Meet The Commanders
I can confirm that he of the long build time will be making a glorious appearance in the Angels of Death - The Dark Angels modification as one of three commanders for the Dark Angels faction, which could grow to four dependent on 3D and 2D assets to represent the Ravenwing company and the Master of the Ravenwing. The appearing along side the Librarian as commander options will be the Master of the Deathwing and the Company Master (a Captain in other words).
Squad Upgrade Options Expanded
Something which you may have noticed in my early WIP screenshot was the presence of several Dark Angels Tactical Marines, each one using the commander wargear UI to offer a larger range of upgrade options. Now instead of just the conventional four squad upgrade slots there is a potential 12 upgrade slots to utilise. Commander Wargear UI bug you say? No idea what that was, but I've either fixed it or it does not exist the way I have coded everything. That said if you have Advanced Squad Selection enabled in Options and tab through each squad the UI will look a little basic beyond the first squad, but that is purely a cosmetic thing and the upgrades still functionally work as they should do.
No ETA on when everyone can expect a playable public build to be released just yet, making a new standalone race takes some time to implement and troubleshoot unfortunately ('Missing Image' images everywhere at the moment). However, stay tuned for some more interest stuff still to come.