Communicate direct to user desktops via dedicated web. Avoid boring, fragmented, and untargeted RSS. Instead, WinAjax is html you control with full access to cookies, graphics, and other tools you already know to deliver compelling dynamic content.
Some uses: blog update notifies ... message of the day (motd) ... account status alerts ... frequent updates ... news feed ... make offers ... etc.
Deliver your message uncluttered by ads or misclassified by spam filters.
Your message is browserless html: it appears without borders on user desktop. Add a transparent "drop-out" color to define non-rectangular showcase direct on desktop or hide entirely when there is nothing new. This is high-impact at user end, using your server-side web site programming to supply the content.