Things I like about Windows 7
I am currently using the beta of Windows 7 and I must say I like it a lot. Here's a short list of things I "discovered". I must add that I use it in a VMware environment, I don't like the idea of a beta OS installed as main OS on my workstation.
Progress bars are now visualized within the (minimized) taskbar icons

Screen resolution can be accessed directly from the context menu on your desktop

A Snipping Tool is part of default installation (at least in the Ultimate edition)

New 'Libraries' in Explorer-view allowing you to use 'Favorites' in your folder-structures

Much friendlier BitLocker support (Some UI improvements, including the option to right-click on a drive to enable BitLocker protection, support for automatic creation of the hidden boot partition required for enabling BitLocker on an already-installed system (!!!) and support for encrypting multiple machines with the same key)

Immediate media-discovery within Windows Media Player 12 (WMP12) instead of waiting to be indexed your files get added to WMP right after you add them to your libraries, like My Music, My Videos etc.

Multi-download from Internet Explorer 8 - Wait no longer for your first 2 downloads to complete before you can start the next 2: you can download at least 4 files at the same time, I did not manage to test it's limits yet. I do think it's rather strange by the way that this is possible, because Microsoft's official reaction in the past about the 2-concurrent-downloads-limit was regarding standards that they wanted to be compliant to: RFC 2616, which covers HTTP1.1.
Ofcourse there's much more to mention, but this is what I quickly wanted to add to my blog at this moment. This probably is one of those "ongoing blog posts" where more stuff will get added to along the way.