For those who use light wallet without market functions, this site can be web-based shapeshift-style market, which connects internal market to users.
It can also contains UIAs from gateways. So if internal market exists, this site can help exchange one asset to another asset.
This will reduce burdens of small gateways as well.
e.g) I can build gateway that issues GATEKRW. Then I make BitUSD<>GATEKRW market in internal exchange with buy/sell wall. People who use light wallet are able to exchange GATEKRW to BitUSD just through sending GATEKRW to bitassets.io address.