Googlin (beta) launched a desktop client
which shows avatars on web pages. Googlin has many features including file
transfer, a backpack of media, scalable avatar size, an avatar configurator, a
round menu, a buddy list, and a HTML version similar to weblin.lite, and
probably much more.
Googlin uses the XMPP protocol and Adobe AIR.
It seems as if the Googlin people learned a lot from Weblin. Googlin started
development shortly before Weblin ceased operation. There are not many users
yet, but they just started the beta. Googlin seems to be supported by a former
Weblin investor, the Swiss Mountain Partners Group.