Look for an official announcement sometime today.

Yahoo has something new to yodel about: tweets.

In its latest attempt to make its Web site more compelling, Yahoo Inc. is plugging its services into the rapidly growing craze of posting short messages, or "tweets," on Twitter.

Although Yahoo planned to announce the Twitter partnership Wednesday, most of the new features won't be available until later this year. Among other things, anyone with a Twitter account will be able to tweet and see the updates of people they're tracking while logged into Yahoo's Web site.

One change occurred Tuesday, when Yahoo started to show a wider range of Twitter updates in its search results — something that Google Inc. and Microsoft Corp. began doing late last year.

Like its rivals, Yahoo is paying privately held Twitter an undisclosed amount of money for better access to its data.

Yahoo previously had been using Twitter's free tools to find tweets that pointed to the latest news about hot topics.

Unlike Google and Microsoft, Yahoo plans to turn its Web site into a tweeting perch. This follows Yahoo's recent commitment to tether its Web site to Facebook, which is even more widely used than Twitter.

Read more from Yahoo!News.

For those of you still resisting Twitter: