I have submitted my website's URL but didn't get any confirmation afterwards. Maybe it's just me and my browser, but it would be nice to have something like "ok, got that link! Thanks!" somewhere.
You should get exactly that. It might take a few seconds as I try to find the RSS feed right away... Just try submitting again, it will tell you if the link is already in the submissions.
Yes, it told me it has been added already. Thanks.