Ribbit, one of the earliest web-based telephone services (acquired last year by British telecom giant BT), plans to ride Google Wave’s coattails — announcing the integration of several gadgets allowing voice calls, phone conferencing, text messaging and voicemail transcription into the search engine’s new, much-hyped communication platform.These services, available in the limited beta release going live tomorrow, are meant to introduce voice as a major pillar of net communications, along with email, social networks and instant messaging. Google’s Wave ties all of these modes (and groups of people) together into a single interface. Ribbit has capitalized on this format, letting you easily select which members of your Wave you want to include on a call. In a document that opens up on the right-hand side of the screen, you can add Ribbit’s conference call gadget: A list of everyone invited to the call with icons allowing you to call them with one click and showing their connection status. You can also add text above and below this gadget providing context for the call. Everyone invited to this particular call can view the edits in real time. Once this is set up, the call leader can click one button to call all participants at once. The gadget shows everyone’s phones ringing and then picking up as it happens. These calls can be routed to land lines, mobile phones, your browser, or even other VoIP services like Skype.For the time being, conference invitees need to provide their own phone numbers, though the company says it is working to integrate people’s contacts and address books to supply these numbers automatically. It is also developing call recording and playback capabilities — even to the extent that it will indicate who on a call said what.Similar Ribbit gadgets allow users to send text messages to phone numbers directly from their Waves. They can also receive text messages from phones, which will be included in their regular Wave stream along with messages, emails, photo galleries and