In that way, you could also make it possible to connect to multiple hubs the same time, by clicking on an item with subitems
(like in the screenshot above: if you click on 'commercial sites', it would connect to Adobe, American Online, etc etc)
The second suggestion is to make an option to refresh all the hubs, so that it gives the most actual information about the hubstatus (how many users, it is full or not, is it still alive, etc)
And another small thing, i like to have drag & drop support for the hub window, so that you can drag a hub to the favorite window instead of right-click, add
