Nothing more reliable where we can keep our stuff
Is Google Docs not an option? Would let us have tables and links, etc. It does attribute who types what. It has a chat section. The same team who made Etherpad (which is what Titanpad is, it took the source that the Etherpad team released when they were bought by Google) works on Google Docs now and many of those features were integrated into Google Docs. A quick copy+paste could move our stuff over, if this seems viable to you.