Got servicestack's server events up and running - but it seems for my app and their demo runs 1 message behind
If I send 2 then I receive 1, then sending another I get 1 more - and so on
A neat milestone, currently my demo site will display 10 items fetched from Application layer
You can then click one to pull the details

Pulling the details will add your session into the cache subscribed to changes to that particular item
Then if you "Click Here" it will send a change description command for the current selected item
And because your client is subscribed to updates for that item you will receive a server side event with your new item detail

All of this is really rough at the moment, cleaning coming soon