I need a few more evaluators of a new widget before I make it generally available. It provides businesses that take phone appointments an online alternative. This widget is compatible with WP v2.8 or later. It allows clients to search for openings and make an appointment. Rather than using a proprietary calendar, this widget records appointments on the business's Google calendar(s).
Take a look at it on mikosm.com and try it out there. Mikosm will create a demonstration calendar and allow you to play with the widget. If you want to load the plugin on your site, use the contact form to get in touch with me.
At least try out the widget on mikosm.com and let me know what you think of it.