How NOT to design an online chat invitation

OK, this is getting to be a theme. A colleague just forwarded an invite to an online chat hosted by EdWeek. When I followed the link (the content may have changed since I captured it), the content looked fairly compelling: "Please join us for this online chat to discuss ideas for producing more innovation in K-12 education." OK, I'll join you. BUT HOW??? Is there a special site? Do I need a password? A secret handshake? All I know for sure is that, "This is not an audio chat. No special equipment needed." Cool. But HOW DO I JOIN THE CHAT? From looking at things (primarily the fact that the info is on the root of the domain www.edweek-chat.org), it appears that all I have to do is come back to this URL at the time of the chat and I'll be able to participate. Assuming that's true, that's a really straightforward way to hold a chat. No passwords, no secret handshakes, just come back to the site at the right time. Simple. All the more reason to point it out. All it would take is one sentence. In fact, I almost wrote the sentence just now: "To participate in the chat, simply come back to this URL at the scheduled time." Not only would that sentence have given me the information I need, it would have made me say, "Wow, that's a really straightforward way to hold a chat." Instead, I'm writing this post, bemoaning yet another lack of a call to action.