As I have recently purchased a new machine I had the need to do some documents online, i have been using google docs for almost everything (including viewing PDF), however when writing up my article about windows media 7 meta dataI had a need to create a visio diagram online.
I found a great tool called gliffy. You can see in my blog post how I have used the online visio alternative to create a great little overview of how i have my media setup.
I published the document to a jpg file and uploaded to my blogsite to have it visible in my article. There is the free option as well as a premium option, however the free version has all that I need for the moment. see http://www.gliffy.com/features/ for the full set of features.
Anyone has used Visio before will be able to use this without blinking!