In you default_grid.php, change the Table structure to a Div oriented structure.
Not supported yet, but my idea is to propose that ( 'Blog' brick ), means your items are stacked inside div.
It is not a big deal to do it mannualy because you have everything already prepared.
You'll see JDom call. These are the HTML rendering. Just move them where you want. You only need to keep the 'foreach' iteration structure and doing what you whant inside.
You can also copy/move the headers that are able to sort the datas. (when setted for it)