I have been playing with a local installation of PostGIS & GeoServer. I would like to move my work online now to share it with several collaborators.
The proof of the concept map will consist of simple WMS and WFS services mapped through OpenLayers and GeoExt. It will be based on a map of ~3000 administrative units. Initially it needs to serve several people only. From then we will be working on polishing final view and functionality of the application.
I was thinking about using Ubuntu Server on cloud VPS, most likely hosted on rackspace.
My question: what would be the minimal server size I would need to use to start playing with this data online? There are few of them available. Once we decide to open the service to public rackspace promises seamless way of scaling up the service, so I would like to know what bare minimum RAM I need to start with.
Update 1: Similar discussion on GeoServer forum.