It appears that there will be a delay in creating a standard for thin APs to communicate with switches: An effort that became known as lightweight access point protocol was started mainly by WLAN switch vendors who hoped to come up with a standard communication method for thin APs. Such a standard would eliminate the requirement for enterprises to only buy APs from the same vendor they buy their WLAN switches from. But the LWAPP standard proposal has expired. In its place is a new effort known as CAPWAP, or the control and provisioning of wireless access points. Eventually, the idea is that a standard like the one the LWAPP group had hoped to create will be worked on within CAPWAP. In the meantime, CAPWAP's goal is to work on defining the architecture of WLANs.
I'm surprised that LWAPP ran out of steam and I think it's unfortunate for the WLAN switch makers. One of the biggest complaints that I've heard of from enterprises that want to deploy WLAN switches is that they have to buy access points from just one specific vendor.