Twitter plans a Google Adwords-style advertising model, according to All Things Digital.

(Read more at 140char.com.)

Ads will be delivered via searches on Twitter, and come packaged in 140 characters or less, which might present a dilemma for businesses to get their message across. That said, we’ve all had a lot of practice at selling tweets, so advertisers should be at least semi-prepared.

(Imagine how much better this would all be if Twitter searches came with TweetRank? Perhaps the users with the most clout could be linked up to the advertising model and rewarded accordingly.)

This is a bit of a no-brainer for Twitter. I’ve often speculated on the plausibility of an Adwords-style system on the network (using Spotify as a case study) and the most surprising part is that it’s taken this long to implement (and still won’t hit the platform for a few months yet).

It’s really too early to speculate about the consequences of all of this without more information, but I do have one question: will the option to advertise be open to everybody, like it is with Google’s Adsense program, or is Twitter going to continue the form it has shown with the suggested user list and verified users, and only offer this service to their personal favourites?