Via Electronic Forms I ran into ‘SharePoint Forms’, a web based InfoPath client for SharePoint.
“SharePoint Forms provide out-of-the-box web forms for SharePoint. It allows organizations to deploy powerful yet simple electronic forms solutions with SharePoint without the need to deploy InfoPath on every desktop”
Seems like a useful product which should have been earlier available (2 years) 
. With Forms Server in Office 2007, this product will probably focus on existing and nearby SharePoint implementations.
View demo here