Compare the three recent sales to the $1.1 billion fetched earlier this year by Tumblr, a microblogging site that allows users to quickly post words and pictures and whose founder, David Karp, once said advertising "really turns our stomachs".
Over the past few years, Tumblr, a microblogging service, has steadily built a community of fans and users who like the site's combination of social networking features and simple blogging tools that lets them quickly post photographs, videos, songs, links and bits of text.
The owners of the 13-employee company, Darcie and Kent Krueger, invested slightly less than $100,000 in new Web site technology from I.B.M. that, starting last month, allowed them to more quickly post sales and product recommendations, among other things.
The Web 2.0-ness of the web-app comes from tagging, sharing with others, and the ability to quickly post the files you choose onto eBay and MySpace.
Much like letgo, Facebook Group members can quickly post items, view each other's profiles, and kick off private chat sessions by way of Facebook Messenger.
Six Apart has introduced an iPhone version of their BlogIt software, which allows users to quickly post updates to their blogs, Twitter, Pownce, FriendFeed, Jaiku, and Facebook.
