Questions about the free hosted xwiki.

Hello, I have been putting a lot of time into researching and testing wiki's to use for a work and document collaboration intranet for our non-profit organization that has highly non-technical users. After tested hosted wikis and installing about 4 different wikis (mediawiki, pmwiki, wikkawiki, etc) on our hosted web server (startlogic.com), and not being happy, I tried a xwiki.com wiki and I like the functunality and features. It does not seem possible to install xwiki on a hosted web server (correct me if I am wrong) , so I have some questions about the free xwiki I am currently using: 1. How much storage space does it offer per file and for the the whole wiki? What other limits are there to the free version? As an under-funded non-profit we are unable to afford a professional hosted version. 2. I am a big fan of hosted services (gmail, salesforce, writely, etc.) but xwiki.com is not quite that large and known of a service host. If we actually decide to built our intranet on xwiki.com, will we run into problems with downtime? How high are the risks of the servers being shut down and losing all critical data? 3. Currently we are without time or resources to setup our own server, but eventually may want to set up our own server to run it. Will it be possible to port our hosted xwiki onto our own server without losing data? Thank you so much for your help on this matter -- Ryan Wood www.absoluteontheweb.com