Aggregated instant messaging site Meebo has just signed a round of advertisers and media partners as it seeks to beef up its user experience, reports ClickZ.

The site also launched Meebo Rooms, a commons-type offering where people can join around one conversation. Some of these rooms will be dedicated to content from media companies, including Blip.tv, NBC Universal and a host of others.

Some publications will offer skinnable Meebo Rooms on their own official websites as well.

Media companies see the Meebo partnership as a way to gain exposure to a young, tech-savvy audience. Leveraging the multiplicity of chat applications keeping Gen Y circles connected, Meebo provides a consolidated space where users can sign in once and access multiple chat clients, including AIM, GChat and Yahoo Messenger, among others.

Meebo will soon begin testing video ads on the site and collecting feedback from users about the new functionalities.