Pues si no te llegan tenéis el siguiente proyecto en CodePlex reune una serie de funcionalidades que el núcleo de ASP.NET Ajax y ASP.NET Ajax Futures CTP incluyen:

http://www.codeplex.com/AjaxEnhancements

Estas son:

Sys.Fx.Collections – Collection classes including:

• IEnumerable
  
• IEnumerator
  
• List
  
• Dictionary
  
• DictionaryEntry
  
• $foreach() to create a for..each enumeration
  
• $break() to simulate break in for..each and iterators
  
• $continue() to simulate continue in for..each
  
• $yield() to simulate yield return in iterators
  
• $iterator() to simulate iterators
  
• Array and String enhancements to support $foreach() enumeration over Array values and String characters

Sys.Fx.Query – LINQ to Javascript implementation including:

• Sequence
  
• OrderedSequence
  
• Grouping
  
• Lookup
  
• $from() to simulate extensions

Sys.Fx.QualityTools – Unit Testing framework including:

• Test Classes
  
• Test Methods
  
• Assertions (areEqual, isTrue, inconclusive, fail, etc.)
  
• Exception testing (with Sys.Fx.QualityTools.ExpectedExceptionAttribute)
  
• Test Lists
  
• Debug and DOM element test writers for results

Y adicionalmente provee al Visual Studio Team System las siguientes características para hcer testeos unitarios:

AjaxEnhancements.QualityTools

• AjaxTestClass class to provide unit testing integration
  
• Test lists

AjaxEnhancements.QualityTools.VisualStudio

• VSIP Package containing integrated test tools