Probably if you are reading this blog you know about
tudulist.com, an application that's 33% tudulist, 33% groupware, 33% calendar I developed some month ago in order to test a Ruby framework I wrote for myself and that eventually was put online for everybody to use.
Well it's very likely that in few weeks the development will continue in a more serious way than before so if you are still using it like me it's time to ask for features :) Obvious things like RSS, notifications by email when events are near to expire and file attachments will be the first developments. Thank you!