hi - i have been searching the websites and google and the zope/plone product pages for a "product" which will work like a groupware/colloration system - much like Yahoo Groups. features desired include: * email and list messaging * filestore for multi-type documents (eg pdfs) * shared calandars / meeting i have pnly recently beocme familiar with zope and plone and have a site up and running but which is "presentation only" for the pubnlic - a groupware system would be much more interactive ... i know i can install things like PloneMail or similar ... but i don't know / want to program the underlying mechanisms to propagte meeting invites etc etc ... the CPS website is not very open - i can't see a list of features or screenshots or a demo site. does anyone know if something like this exists? i am keen on a zope/plone solution because it would keep things simple and reduce the dependence on multiple platforms... i want to stick with an OS-independent zope/plone .. benefit from the zope scalable middleware and have simply replication/backup options that zope/plone gives me (data.fs?) thanks tariq