The users can now register for access to Skype Meeting Broadcast, which is a largely device-agnostic video conferencing tool for meetings with up to 10,000 participants.

The preview features include the ability to take feedback from attendees via Yammer integration and Bing Pulse sentiment tracking.

Also, enterprise users can now register for PSTN Conferencing, which lets the people dial into a Skype for Business meeting in Office 365 from a landline or mobile. This is currently open in the US only.

In addition, another technical preview is Cloud PBX with PSTN Calling, which allows the business users to make and receive phone calls via Skype for business, with the addition of features like hold, resume, forward and transfer. For now, this is currently open in the US only.

End-users cannot actually sign up for the trials though, so they will need to register if they are interested.