I often wonder why the Web 2.0 revolution hardly ever involves Flash. Although more and more data can be called up using RSS feeds, these feeds are still mostly used in HTML pages. Just look at Facebook, Last.fm or even Blogspot.
Strangely, it’s not that hard to implement a blog post, a twitter update or even CMS content in a Flash site. Just call the blog’s RSS feed and parse it. As an example I’m parsing this very blog on my portfolio site: www.eerkmans.nl
When connecting to an external domain, flash needs to find a so-called ‘crossdomain.xml’ file on that domain. If flash can’t find this xml file, it won’t connect to the domain and just hang. But fear not! You can redirect your RSS feed through Feedburner. They have a crossdomain.xml so you can still access any RSS feed that Feedburner can access.
If that doesn’t work either, you’ll have to write your own PHP file that sits next to your SWF, and does the connecting to the external domain. Flash then accesses the PHP file and thinks it’s getting it’s data from it’s own domain…