Workaround for emailing Rated 5 out of 5 stars
Great plugin. Quite disappointed there is no version for Firefox 4.x. Currently looking for a similar way to do what Clipmarks does. Their "Amplify" service doesn't provide an email option.
After playing with their Amplify extension, it turns out one can use it to send email via Clipmarks. Strange Clipmarks doesn't mention this.
How it works:
1) Setup your (new) Amplify account to send clippings to Clipmarks.
2) Use the Amplify extension to clip from a website.
3) After the clip is posted to Amplify, the Clipmarks window pops up allowing one to post the clip to Clipmarks.
4) After posting to Clipmarks, you have the usual option to send it by email.