Google Talk Webmessenger
Gtalkr is a web based instant messenger that allows you to log into your Google Talk account and chat with your existing contact list. Basically, it's just a replacement for the desktop Google Talk, just like we have a MSN webmessenger for MSN messenger. For a long term basis, a desktop messenger would definitely do better than a web based messenger.
For the moment, I don't see that it's useful as most of my pals have not migrated to Google Talk yet, though I admire the simplicity of the interface. In addition, Gtalkr is neither a Google's service nor affiliated to Google. So, try at your own risk! To know more about Gtalkr, Om Malik has a very good review on it.
Update: It seems like the service is not available anymore. I suggest you use your Gmail to chat online. (Thanks, Gonzalo)
Update: Google has a new online Google Talk service for this purpose.
