San Francisco-based Webcast Solutions, which is privately held, declined comment, except to say it planned an undisclosed announcement tomorrow. "It's a little premature," a spokeswoman said.
StarMedia also declined comment but said it planned an announcement.
Webcast Solutions, which provides live and on-demand Webcasting, made its first Webcast in July 1995. It previously has provided Webcasts to Macromedia, Wine.com, and StarMedia, among others.
StarMedia's network targets Latin America, competing with the likes of Yahoo and America Online in capturing customers. The company has previously acquired rivals such as LatinRed of Spain and Cade of Brazil.
This summer, Yahoo completed a deal to buy Broadcast.com to expand its broadband offerings and reach more Net users who listen to Internet programming at work.