Arnaud Leene pointed to TagCloud.com. It is a service which automagically generates tag clouds from any number of rss feeds specified. The tags are generated from the system, based on keywords from Yahoo search.

The system seems to work well with english content, but does not return very good results with the german feeds I tried. There's a new option to define "stop words", though, which can be filtered and ommited from the tag cloud. Another thing is that the system seems not to be able to deal with international characters like ä, ü, ö and so on when they are HTML-encoded.

I really like the approach this service takes, though. I'm just wondering why they generate all tags through Yahoo search keywords. Many posts already are tagged, either through the use of Technorati tags or through one or more categories (which mostly are also specified in the rss-feed through <category> or <dc:subject>). I'd like the system to take these tags into account as well.

Here's a tag cloud just for this blog's feed:


Tags: Tagging, TagCloud