A young British woman has created an AJAX-based Second Life client that runs in your browser, giving you a text-based view into the virtual world.
Katharine Berry, a student in the UK, has created an in-browser AJAX application that allows you to log into the virtual world of Second Life, but without all of the laggy graphics. This is a great way to pop in-world for a moment if you just want to chat with other residents, and as far as anybody else will be able to tell your avatar will look just fine (although mostly immobile).