WEP Encryption Detection

Hi all,
 I've successfully set up a system.
CPQ M300
OpenBSD 3.1-current (thank you jsyn)
Linksys WPC11 (v2.5)  - Prism 2.5 chipset

1. How can I detect if the network traffic is using WEP or is being sent
clear-text?

2. If it is detected is there any way of determining what level of
encryption is being used (40bit vs 104bit) without actually breaking the
encryption?

-benh