Something that all my clients seem to ask for is group notifications for workflow task. E.g. when a step in workflow is assigned to a group, all users in the group get an email notification.
If this a common request for others implementing EPiServer?
I don't think EPiServer will be adding this feature as they are moving to Windows WF? (If someone from EPiServer is reading, please correct me if I'm wrong)
Anyway, I have created an HttpModule that enables this functionality. It doesn't require any changes to your workflow, and basically enables the email notifications for groups in a workflow.
If your interested then leave a post here or check out my blog (http://episervernz.blogspot.com) and I'll see if I can make it available to the community.