User1918766559 posted
First of all, In building mobile web , it should not affect the development time & resources by using Enterprise libraries. Since Microsoft Enterprise Library 5.0 has wide integration features with ASP.NET , Winforms, Complex WPF with Prism.
So , smoothly it can build with mobile asp.net.
1) Is this too much overhead where speed is mission critical? - For Speed constraints, it's not much overhead. Best to use it in Mobile device based application with Rich RIA like Windows Phone.
2) Have you implemented this library for a mobile site? If so, why? Please describe your experience.
Validation support in Mobile web can be implemented with it. Same like desktop web development.
http://www.codeproject.com/KB/library/IntroToValidationBlock.aspx
3) Given time and resources, would you implement this library?
With Mobile device based applications & smart clients definitely.
http://msdn.microsoft.com/en-us/practices/dd441795.aspx
Thanks,
Anindita
http://anindita9.wordpress.com