I have the 770 but I think this question is not tablet-specific, more about my ignorance of 802.11. I dual-boot either the 2007HE or Fanoush's hacked 2006 OS.

I can connect to my shared-key wireless at home without problem. But I cannot connect to almost all "unsecured"--those with the little open padlock--wireless connections I see in the 770's list on clicking the little globe. I either get a connection error (most common, don't have the exact message text) or something about a "local-link" established. Either way I can't connect to the vast Internet.

So I wonder what the little unlocked padlock really means. I found little info about the local-link thing, but somewhere I think I read it means that a connection was established to a login page but the 770 doesn't show the page. At any rate, is there a way to more reliably use the unsecured networks that show up?