Ubuntu :: Eliminating Prompt For Keyring Password At Login Safe?

I'm about to turn off the prompt for a keyring password at logon following these instructions. But I wonder whether I'm going to be losing anything in the way of security. To eliminate the prompt for the keyring password, am I going to miss out on anything? In other words, just what does the keyring do? If it matters, I don't use Evolution e-mail (I just use old-fashioned web mail). To my knowledge the only passwords stored on my machine are that for my wireless network and whatever website passwords my browser stores.