Micro-blogging service and Twitter competitor Pownce is shuttering its site. Presumably the company was purchased by SixApart (makers of the MovableType and TypePad blogging software and service), and its technology will presumably be rolled into a SixApart offering at some point in the future.
Pownce never reached the critical mass of Twitter despite having arguably better [...]

Microsoft’s indirect attempt at a youthful social networking site, Wallop, is packing it in after 2.5 years as a venture-backed spin-off company.
And one thing appears to be clear: Regardless of the merits of the technology and features behind the platform, Wallop never had much of a chance of succeeding during the same time frame in [...]