Most of Apple's developer services have been unavailable for a week, leaving some app makers in a lurch.
iPhone users reported being unable to activate their new iPhones due to issues with Apple's activation servers on Thursday.
As Twitter grows its ad business and user base, downtime for the site can mean business lost for publishers, marketers, and self-promoters.
After more than a week of downtime, Apple's bringing back some major parts of its developer site and connected services.
Microsoft's consumer e-mail service suffers downtime during the U.S. morning rush, but despite tweets sent out by the software giant, the status page still says the service is running.
Popular file sharing service YouSendIt experiences significant issues, with users unable to send files to one another.
Twitter suffers a brief outage which roughly coincides with a new security feature that keeps user data from ending up in the wrong hands.
The microblogging service's performance might have improved for some, but according to uptime monitor CheckMySite, it's still not where it should be.
iDisk downtime -- switching IP address to fix
Apple's MobileMe service suffers another outage. This time it's Web mail yet again, which seems to be giving Apple some of its biggest hiccups.