Does your social media marketing depend on Twitter?

Over the past couple of days, Twitter’s been down most times I’ve tried to use the service.
Others are frustrated too:
Twitter: Something Is Technically Wrong reports:
“I’ve mostly stopped bothering to post when Twitter is down like it is now and like it was yesterday (honestly, it’s news when they keep the site live for 24 [...]

Social Media Marketing - get daily tips and info

What’s “social media marketing”?
Wikipedia says:
Social media marketing (SMM) is a form of internet marketing which seeks to achieve branding and marketing communication goals through the participation in various social media networks such as MySpace, Facebook, Bebo, BOOMj, YouTube, Dailymotion, Hi5, Gather.com, social web applications (webapps) such as reddit, Digg, Stumbleupon, Flickr, iLike, Wikipedia, Squidoo, [...]