This post has provided a quick look at how form post scenarios work with ASP.NET MVC Preview 5.  Hopefully after reading it you have a better sense of how you handle form and input entry scenarios using a MVC model.  You can download a completed C# version of the application I built above here.  I will post a VB version a little later this week (it is unfortunately 4:30am while I'm typing this and I need to hop on a plane in a few short hours and have not started packing yet).

Important: If you don't like the MVC model or don't find it natural to your style of development, you definitely don't have to use it.  It is a totally optional offering - and does not replace the existing WebForms model.  Both WebForms and MVC will be fully supported and enhanced going forward (the next release of ASP.NET WebForms will add richer URL routing features, better HTML markup/client-side ID/CSS support, and more).  So if after reading the above post you think "hmm - that doesn't feel natural to me", then both don't worry, and don't feel like you should or need to use it (you don't). 

In my next post on MVC I'll cover how to integrate AJAX into your ASP.NET MVC applications. 

Hope this helps,

Scott