The Evoca Voice Comments Plugin for wordpress allows users to leave voice comments in addition to regular written comments on a Wordpress post/page/etc. When a user leaves a voice comment, it can be viewed and replayed by any user who has access to that comment. So imagine seeing threaded voice comments/conversations on a Wordpress page. Such a feature is great for constructing an online foreign language learning lab within wordpress where students can leave voice comments to practice the language, submit assessments, and leave feedback.

Although Speakpipe has a Wordpress plugin, it only allows for leaving sending voice recordings to the administrator of the Wordpress site. This will not help when we want users to interact with each other via their voice on a particular page/post in Wordpress. This would be a welcome addition to Speakpipe's features and would definitely expand Speakpipe's audience to teachers and educational institutions who wish to give their students quality language instruction/learning online or in a blended environment.

See the Evoca Voice Comments Plugin for Wordpress here:
http://www.evoca.com/how-it-works/create-recordings/embed-wordpress-voice-comments-recorder/

and

http://wordpress.org/plugins/evoca-voice-comment-recorder/