I think Panos asks if there is a ready-made widget for that (an RSS button that when you click shows a dropdown with all autodiscovered RSS links from the page, allowing you to select one to open at NEW window/tab [where you can subscribe as usual or copy-paste the URL from the address bar of that tab/window use elsewhere])
Do you have any such control in mind?
Should we implement it ourselves, is there some method we can call on MonoX (e.g. enumerating the webparts in the page and getting RSS url from each of those that are providers, or call some RSS manager class from the page context or something) to get a list / array of those RSS urls? Ideally we'd like to query some .NET object's property from ASP.net inline command to get back a list of , separated URLs (or a list/array of URLs that we can convert to a string list with some static backend method injected in the page's markup via ASP.net syntax)