Last year when I was working with OpenMedia.org I developed a "Salsa Webform" module which works with Salsa API and it creates a tab in the webform settings. On that tab you can link your webform fields up to custom fields inside Salsa so that when the user submits the webform the data goes to Salsa.
It is a working module, but still a WIP in terms of performance. Basically the field matching is a bit loopy and if you used it on a large form it might be quite slow.
I'm just about to put this module on GitHub and I'll sandbox it here on Drupal.org. Looking for anyone who might be interested in helping to polish it and have it ready to release here as a module? If you think it's a helpful module or it fits with some other Salsa module you're working on let me know.
Thanks!