Choice in Web Technologies for RIA Admin Sites

There are differences when talking about administrative sites vs end user sites.  Administrative sites can require highly interactive between many different domain entities.  For great RIA user experience you could call this the single page model.   In the year of 2010 you must have lots of time and resources if you want to build and maintain this is a javascript based technology (jquery being most popular)

1. Silverlight can provide an amazing user experience, for Microsoft developers this has a medium up front costs and lower long term cost for this high level of user experience - Cons - not supported by mobile.
2. Jquery - expensive to maintain, and more difficult to debug (although SL has an async learning curve), also does not support multi-developer projects as well.  Good to great user experience
3. Traditional web forms - low up front cost / time, medium to\ low long term cost low to medium user experience - mobile yes to some degree, but bad user experience
4. Native mobile apps. Doesn’t replace the need for a web based admin tool as well. Provides the ultimate user experience. Cons – Additional development for a smaller market share.