Google just launched an iPhone-friendly interface for its web-based Google Talk client—point your mobile Safari to google.com/talk to see it in action. Firefox users, this also means, as the Digital Inspiration blog points out, you’ve got a friendly little GChat client you can keep loaded in your sidebar (create a bookmark, check “Load in sidebar”), but any browser can access the interface through talkgadget.google.com/talkgadget/m.