Nice move for both of them. Key paragraph from the press release:
The partnership allows the students and teachers using Glogster EDU �” now more than 450,000 around the world �” to share their Glogs using the popular SchoolTube sharing site, and also allows them to easily import multimedia elements found on the SchoolTube site into their Glogs. All student-created materials on SchoolTube must be approved by registered teachers, follow local school guidelines, and adhere to the company’s high standards.
So it provides them a moderated means of publication, and also a way for Teachers to browse for edu-safe glogs. Kudos all around. Hope more sites go this route. There’s so many great Web 2.0 tools that educators COULD be using, but because of red tape and policy issues, they’re unable to leverage them.