What developer features excite you the most for WSS 4.0 / SharePoint 2010? [closed]

Answer 1

Visual Web Parts: Design-time experience for web parts. No need to dynamically create controls or use kludgy user control workarounds. This should ease the pain ASP.NET developers find getting up to speed with SharePoint.

Answer 2

Powershell support

Anything you could do with STSADM can now be done by using the fully power of powershell. There will be feature parity between the two.

Answer 3

More control over Sync Event Handlers:

Currently in 07 We have an option to cancel the event set the ErrorMessage that will be displayed in the Plain Boring Page of SharePoint. It has been improved in MSS 10 ,now that we can set the redirect Page to which we want to redirect the user to.