Question : Problem: Wireless Bridge

I have (2) linksys WET200 wireless bridges and am looking to connect two LAN segments together.  It seems from the documentation that I can either:

A) connect (2) WET200 bridges together using Ad Hoc mode (WEP)
B) connect (1) WET200 to an Access Point using Infrastructure mode (WPA or WPA2)

What is going on?

As option B is some sort of hybrid bridge where the bridge acts as a Client station and 'clones' its ethernet ports over it.  Will it have any limitations that are not readily apparent?

Does WPA, WPA2 not support bridging or am I not looking in the right place?

How do the expensive wireless bridge products (Proxim) handle security?

Answer : Problem: Wireless Bridge

mavaks, thanks for your advice...it is the same info I've gotten from Linksys and 3Com, but my basic question was why?