We started talking about this as The zine - a magazine made just for you but everyone pronounced it wine. I think the nod towards xeroxed zines from the 80s is appropriate. Take a windows 8 or flipboard style summary view, but give people enough control to curate their content. This should be a tool people want to tinker with.
We see using the grid layout for any number of UI challenges, so basically think of it as an alternate view layer for an improved page list block. We also want to make it so you can include 3rd party feeds in your grid. So you might include your company's facebook, twitter and youtube feeds in a community page, along with press releases youre posting to the site. Interacting with any of the tiles in the grid makes a page for it on your site so we can store whatever data is required. You should be able to post back to your grid, and have it auto-post to the same services it ingests content from. Add-ons could/should create tile layouts so they can be aggregated in this view. Grids can have automatic sorting, filtering and sizing logic - combined with curated tiles. Tiles can have conversations and events attached to them as free tools in the core.
We will use grids for the main landing page on the demo site, and for your My Account area as much as possible.
All of these are very loose creative direction: