Packet8 introduced mashup that lets a Salesforce.com customer use Packet8’s virtual office PBX offering. Broadsoft and Sylantro – both virtual office (hosted) PBX vendors – have also brought in salesforce.com mashups through their developer programs.

However, while Broadsoft type mashup makes sense for large enterprises and SMEs, Packet8 serves smaller business customers. The service provider carried out development of the mashup inhouse. Packet8’s parent company, 8x8, manages an open source developer program at http://croczilla.com/zap. Zap! aims to produce open source SIP client using Mozilla as a platform. Developers are free to develop applications on this platform under standard Mozilla open source licenses.

While it is not known exactly how many developers are currently augmenting the ZAP project, 8x8 has about 5 internal developers who spend some portion of their time on the project.