Twitter has unveiled a whole host of new features over the past six months, but could this new surprise be the icing on the cake?

Remember about a year ago when Twitter co-founder and CEO Biz Stone said that 2010 would be the micro-blogging site’s revenue year?

Finally the site has delivered something compelling enough that could see that wish, I mean, assertion, come to fruition.

The social site has just added a new feature that will allow Twitter users to upload videos and other media to their tweets. That also could mean video advertising…

‘Tweet Media’, is: “By default, you’ll only see images and videos shared by people you’re following, and reveal those by people you’re not. Check this box to see media from everyone on Twitter,” describes Twitter.

The feature will enable the embedding of multimedia into the stream. It comes after a string of other innovations this year such as Promoted Tweets – which is already earning the site much need advertising revenues.

The ‘media’ approach is though contrary to the ethos of the site. Adding embeddable media to the stream has the potential to complicate the traditionally simple, 140-characters-of-text aesthetic of the network. This may have something to do with why Twitter has now removed the feature.

Mashable unearthered ‘Tweet Media’ earlier today. But when we went poking around we discovered the feature no longer existed.

Here’s the line from Twitter (from Mashable) “We’re constantly exploring features and settings. What you saw was a small test of a potential consumption setting for inline media.”

Twitter also notes that this feature is already a part of both the official apps for iPhone and Android, as well as for certain third-party Twitter apps.

But it’s worth remembering that many users already share photos and videos – either via TwitPic or their other more ‘social’ networks such as Facebook. However, it could be a golden opportunity for advertisers looking for cut-through on the site.

Does the Twitter feed need media? Or, an even better question is, who is still using Twitter anyway?

With so many users, Twitter needs to do something more compelling not just to attract revenues, but to attract creative ads that get people to stop and watch.