Add a quick-click column to 'add to your watched listings' without having to go inside the listing itself and click the 'watch' button. Could be in the form of a checkbox or something similar.
Ok, but it won't be a column, as space is limited. I'll have to add an icon or something - perhaps even better, I'll add a small menu icon to show a quick-pick list of commands.
That's fine.. I know column is probably brutal as screen space is at a premium lol. But being able to check it somewhere would be handy. I'm pretty open on this one.