Social bookmarking site, del.icio.us, has been down since at least 10.00pm PT Sunday night. Recently acquired by Yahoo!, the service suffered a power outage late last week, which according to the del.icio.us blog, has affected the database indexes which need to be rebuilt.

Not a great week for Web 2.0 companies following Typepad’s outage on Friday. But judging by the 226 comments on its blog, del.icio.us has a faithful and loyal following.

Sidenote – some users are threatening to swap to digg, which isn’t a social bookmarking service, but a news ranking engine where visitors vote (or digg) for the content they like. They’re not really competitive – I use both.

Technorati Tags: del.icio.us, digg, Typepad, Web 2.0