imeem: It integrates IM, Blogging, uploading of photos,community formation in to one. Sounds as a wonderful service.
http://imeem.com/index.aspx

Another interesting startup is Jambo Networks which is combining Face to face networking with Wifi Technologies
http://www.jambo.net/

Both of them present in an interesting point of debate–Does community building take place using online services OR Communities or contacts are made primarily offline and the services which will flourish are the ones which will only aid the offline meetings

I would take on the side of later as we see networks like ryze are mainly taking off because of their active involvement in creating ryze offline meeting at various places.imeem kind of services are necessary but not sufficient to create social networking.Sooner or latter they must incorporate jambo kind of service