I still prefer flock - I've got the web 2.0 bug.. it automatically signs into the following services:
http://picasaweb.google.com/NNNikT/FromNikTSMobilePhone
http://nnnikt.blogspot.com/
http://www.facebook.com/people/Nik_Trathen/1207756211
http://www.flickr.com/photos/nnnikttt/
http://youtube.com/user/DRuGNikT
These are some of the other web 2-ish services I have set up..
http://www.photoblog.com/nnnikt/
http://nnnikt.spaces.live.com/
http://pipes.yahoo.com/nikt
http://www.dapper.net/user-dapps.php?userId=17185
Is Google Earth really web 2?? They have a community website that predates it being Google Earth - I used to be a paid subscriber when it was Keyhole Viewer.. I created a fair few placemarks on the community bbs - it has now evolved into a google site...
http://bbs.keyhole.com/ubb/dosearch.php ... fromprof=1
The exciting thing about this one is, if you have google earth installed, it will take you to the placemarks everyone posts... mine are at the link above.
(plus a lot of others, but these are the ones I use)
I'm intending to add any other web 2.0 services I sign up to onto this list over time as I remember to include them..
I use these lists as much for my own reference as to recommend them to you.