Here's the latest on two start-ups that we covered earlier:

OOMA, which sells hub devices that use peer-to-peer technology to provide unlimited local and long-distance voice-over-IP calls, is growing rapidly since its September launch, fueled in part by favorable reviews from major newspapers. Andrew Frame, the founder and CEO of ooma, said 2008 will be the year the company focuses on its retail strategy. “In addition to expanding our business by turning up the retail channels, we are excited for upcoming software releases that will enrich the experience of using ooma and provide new value to consumers,” he said in an e-mail dispatch.

ZAYO BANDWIDTH: After buying five companies, including four regional fiber networks and a retail VoIP provider, Zayo Bandwidth reorganized itself into an operating company, Zayo Group, and three independent units: Zayo Bandwidth, which sells fiber capacity to wholesale and large enterprise customers; Onvoy Voice Services, which provides tandem switched access, SS7 and more to service providers; and Zayo Managed Services, which offers voice, data and video offerings to small- to medium-sized enterprise customers. Don't expect continued growth at that pace, said founder Dan Caruso in an interview. Do expect a tight focus on its existing businesses.