The Posterous team has promised that all the existing services at Posterous (like Posterous Spaces) will continue to be live and the withdrawal of any service will be announced well in advance.

A list of popular Google products and alternatives to each one. Also, a list of Google products which do not have a good replacement today.

A Royal Pingdom uptime test for Blooger, WordPress, Tumblr, Posterous and TypePad found that Blogger has 100% uptime whereas Tumblr had 47.5 hours downtime in past two months.

Tumblr and Posterous have fought a tough battle over the last few years for supremacy in the short-blogging service. Each one tried to attract users with more features. However, now the battle is nearing its end and Tumblr stands at a much better position.