http://www.efortune.in provides a unique way to express professional networking in terms of relationships like colleagues, X workers , partners, freelancers etc...
It has some Micro talk features like Wass Up! which allows you to share with all users whats in your mind. Private messages, secure professional profile, groups, forums are some of the other offerings.
Some of the useful features in nutshell are:
Wass Up! , a never before Micro Talk feature
Professional profiles
Relationship based networking
This was not made to look flashy and nice, it has been created as a tool to help bring a budding society of engineers in a college a way to collaborate more effectively (ASME of UC Merced). Drupal should work wonders for us, as it has a module for projects, events, videos, pictures, and integrates with facebook to try and drum up more support and involvement in the club.
I owe a big thank you to the drupal community for making such a site possible.
We (Drive Net Consulting) just built and launched a small eCommerce website built on Drupal 6 using UberCart. Check it out at Mama Ileen's Caribbean Cakes. Let us know if you have any recommendations, etc.