I'm beginning to think that the settings on my side
are ok and one of two things is wrong: Either I'm
missing a piece of software or there is something on
the coffee shop's side that I'm not aware of. In
either case, it doesn't look like I'll be using wifi
at that coffee shop.

There are lots of other places that offer free wifi. I
have successfully connected to open wifi sites (no
password and no captured web page requiring a key
stroke or two). I have also successfully connected to
free wifi sites that capture the web page and require
a few keystrokes before accessing the internet.

This is the first that I've found that requires a WEP
password (other than my own personal connection though
I now no longer use WEP). If I find another and have a
similar problem then I'll pursue it further. For now
though, I'll just won't use that coffee shop's free
wifi.