There's been a huge amount of talking on the net about the S60 Yahoo! Go! client. Christian Lindholm's blog has a great post, although given he previously worked at Nokia and is now with Yahoo! maybe that much would be obvious. Tarek has a huge number of screenshots from his installation and first experiences, while CNet points out that the client will be pre-installed on Series 60 devices in ten countries (but handily doesn't say which ones).