One of the best free reading out from Microsoft in these days is certainly the book "Improving .NET Application Performance and Scalability".
I'm really happy to discover now that also a PDF version is available. This is really good, expecially if you plan to print all the book or only some parts of it.
I hope MS would continue this road: release free books in HTML and PDF format, this is a great thing for the community. Possibility to have PDF versions also for the last Windows 2003 and IIS books published some days ago (that I've mentioned on this post)? 
#Develop, one of the best Open Source IDE for .NET development, has ready to release the new Beta 1:
Changements on this Beta 1:
- Ctrl+Space completion
- Folding fully integrated
- NUnit integration (via a pad)
- Assembly Analyzer
- C++.NET, ILAsm, WiX backend bindings
- Mini Class Browser panel added to source views
- VB.NET to C# converter included
- Alt+Ins code generator revamped (formerly Ctrl+W)
- Improvements to File Templates
- Improvements to VS.NET exporter/importer (VB.NET especially)
- Printing support added
- New DockPanel Suite integrated, Magic library entirely removed
Great!
