We here at Homeserverland.com have never been one’s to advocate using leaked software because it can tarnish one's perspective. They are looking at what is in essence is a unfinished version of the creators vision and what they take away from it can be completely wrong. With that being said, there are those out there who recognize that it is an unfinished product and can take that into the proper perspective for analysis.  One person who seems to have done this quite well is Rafael Rivera from WithinWindows.com. He has listed what he has found as the positive improvements the WHS developers have made to the OS and I couldn’t agree with him more. Here is a snippet of what he has taken away from code name Vail that we can all look forward to:

New codenames
Vail exposes some interesting codenames, including a few even Mary Jo Foley hadn't heard of. Key among these is "Aurora," which appears to be a Small Business Server version that sits somewhere between WHS and the current SBS products (Paul’s SBS + cloud services dream solution?) and “Colorado,” which appears to be remote device related. (Windows Media Connect or DLNA-based devices, maybe?)

Update: Further evidence supporting the SBS = Aurora theory can be found on various sites, such as http://bjosbs.com/. (The site is registered to a SBS ‘softie apparently.) [thanks to Daniel K. for the tip]

New features
This version of WHS Vail provides two major functional updates, Homegroup creation/integration and media streaming. Both appear to be based on the same functionality that appears in Windows 7, and the media streaming feature utilizes a sweet Silverlight-based player, through its revamped remote console, that transcodes content of virtually any kind from what I can tell, on-the-fly. (I personally tested WMV, H.264, and XviD.)

New Dashboard
WHS Vail comes with a new dashboard, which replaces the awful admin console from the current version with a new normal window that appears to be the basis for similar dashboards in future versions of Windows Small Business Server and Windows Essential Business Server. This Dashboard is customizable, more so than previous versions, enabling server makers like HP to customize it with their own look and feel – color scheme, unique Home tab content, and more.

Add-in changes
Perhaps sensing that WHS add-ins can be the source for malicious and software, or otherwise just responding to complaints that some current add-ins seem to adversely impact the performance and stability of the server, Microsoft is making some big changes to how WHS interacts with these mini applications.

Some add-ins will be “Microsoft certified” and therefore known to be safe/good, while others will be digitally signed (or unsigned) and provided by third parties. Add-ins, of which will now also reside in an online catalog, will be version controlled, preventing the user from inadvertently writing over a newer version with an out of date version, and can support subscription-based services like anti-virus. Vail will also keep a watchful eye on add-ins, intervening when they crash, allowing a user to quickly locate the source of the problem. And, if I'm reading this right, WHS Vail will support the deployment of specialized add-ins to connected PCs as well, not just on the server.  (As in, install AV on the server and have it protect clients as well.)

Server health
In keeping with broader efforts across other Windows Server products, WHS Vail includes a number of server health technologies, many of which leverage the pre-installed PowerShell. It supports scheduled cleanups and backups of both clients and server and checks clients for both anti-spyware and anti-malware protection. While at work, Vail may find the need to generate an alerts or report, both of which can either be printed on-screen or emailed, much like the SBS product.

 You can also find a screenshot gallery that he has created on Flickr here.

Based on everything I've seen, Windows Home Server version 2 will be one of the most exciting releases to come out of Microsoft in a while. I am going to keep looking around and will report back anything else I find.