Online flowchart applications: Gliffy vs Flowchart.com

I am slowly moving over to online office. I try and do all my new documents in Google, Spreadsheets in Google. Presentations I still do on my computer, because my last experience with Google Presentations was so painful that I'll wait another year before I return to it.

For Documents I often need pictures. Mostly those are screenshots, sometimes diagrams. Very rarely - illustrations.

I decided I want to give online diagramming a try.

There are two that I knew of, gliffy.com and flowchart.com. Gliffy was around for a while. I once fancied an idea to write my own in Silverlight, but looking around I found Gliffy and decided it is good enough for me to not bother replicating. Flowchart.com is new, currently (March 2009) in private beta.

I did a little in both. Flowchart.com is a richer in functionality, more intuitive to me, and I think more of a technological achievement being AJAX, while gliffy is Flash.
Flowchart has better collection of clipart.

Yet I decided to stick to Gliffy for two reasons. Its editing a bit snappier, but more importantly it exports vector based SVG.
Flowchart only exports PNG (raster) and PDF. I could have probably extract vector information from PDF if I had to, but Gliffy is an alternative good enough.
There is one feature of Gliffy that might annoy many - for a free account anything you create is public. If you want private diagrams, you have to get premium account. I don't care for my diagrams to leak, but some might.

For web application it is crucial to export in as many formats as possible because its results are to be used in concert with other applications, and one can make no assumptions as to which.
SVG is a standard. For a vector application not to support it is tantamaunt to not caring of its users or wanting to lock them in and deny any chance for interoperability or both. I wish flowchart.com will remedy their missing of SVG soon.