Nathan Weinberg reports that Google fixed a security issue with the new Google Presentations, which leaked user email addresses to the public.
What happened was that when webmasters tried to embed presentations into their web pages, it would then log people into Google Talk via their Google Account. After they logged in, to view the presentation and to chat, it would display the user’s email address to all those who wanted to see it.
Nathan reports Google has fixed the security issue about 15 hours after Google Presentations went live.