A lot of blogs have an orange box with RSS or XML written in it for people to subscribe to their syndication feed.
Here is a handy way to create that without using an image. Imagine if every website did this the total bandwidth that would be saved! Ha.
Here is the code:
<A title="Your Feed Name Here" style="BORDER: thin outset; PADDING: 0.02cm; FONT-SIZE: 8pt; BACKGROUND: orange; COLOR: white; FONT-FAMILY: Verdana; TEXT-DECORATION: none" HREF="Your Feed URL Here">XML</A>
"How is it possible to display data in public folders on a web page!"Matej, this is not likely going to be as nice as you would expect, but there are a couple of ways to do this. If you use SharePoint, there are Exchange Web Parts that render Exchange data nicely. The other alternative is to display Outlook Web Access and specify a few handy query string parameters and get it to render nicely within a web part or an IFRAME (see also: Display an Exchange Public Folder in a SharePoint Web Part).
For more information, also check out the article Integrating Exchange Server 2003 with SharePoint Products and Technologies from June 9, 2004 TechNet.