New feature

I'm currently looking into this, but as of now, Delicious has not added API support for this. Their Firefox extension is able to do it, but through unofficial methods. Since the extension is maintained by Delicious themselves, they would be sure to update it if these methods changed, whereas third-party developers such as myself cannot be sure of this.

Also, the issue exists that a Pukka user might be using the app with another bookmarking service that works just like Delicious but that does not support Twitter.

So, it's slightly more complicated than it may appear at first glance, but I am looking into it.