Not much.
They're ideal for sites like hotels and schools where they blitz the place with AP's and let the WLC sort out channels and power, but it isn't very cost effective for smaller sites and open spaces like your average supermarket.
A well known fried chicken chain were looking into them to run a couple of external AP's for handhelds and one inside for handhelds/customer internet access.
Personally I thought it was insane since the LWAP's were the same price as the Cisco1242's (which support multiple SSID's and they already use Cisco switches and routers), then they had to add about £4k for a local WLC and (iirc) about £50K for a couple of aggregation controllers at their headquarters.
..oh and the licences were only good for three years on top of that.
