Some additional features I’d like to see are:

• Search based filtering. Many sites will fire off a couple of hundred urls in a single page load, drilling down through the mess to those specific urls you’re looking for would be easier with some sort of filtering. httpWatch has probably the best filtering I’ve seen on any similar tool to date, I couldn’t see any search functions at all
• On the timeline I’d like to see the a clearer indication of the various aspects of each connection eg; have the DNS lookup in one colour, connection in another, first-byte download in another etc. Whilst this is available if you go into each call/line-item it would be nice to have the option to customise this output.
• It would be great to have the ability to export the data in different formats eg; CSV.
• Display Flash objects in the preview tab. Currently it renders GIF, JPG PNG etc, it would be nice to have the Flash object rendered as well.
• Display any video data eg; dimensions, codec, audio/video bitrates etc.
• Non HTTP traffic such as streaming services, eg; RTMP, RTMPT, RTMPE, RTSP & MMS

It’s certainly a step in the right direction and I’m most grateful for this latest addition to Chrome. My continued favourite tool is httpWatch, not only does it provide excellent filtering/search capabilites but genrally makes tracing HTTP calls a little easier than the curent Google Developer Toolbar does. However, a team licence (that’s four licences) for httpWatch will set you back just under £1000.

Further Information:
http://code.google.com/chrome/devtools/docs/network.html

Enter Spoon.net a recent discovery which has managed to resolve this problem. Thanks to their virtualisation software I have been able to have IE6, IE7 and IE8 all running at the same time whilst all using httpWatch and AOL’s WebPageTest concurrently as well.

It’s not just browsers either, here’s a blurb from their site:
Spoon specializes in app virtualization and delivery technology, a family of sophisticated techniques that decouple apps from the underlying operating system and enable extremely rapid delivery and launch. In support of its ongoing product development efforts, Spoon conducts fundamental research in the areas of virtualization, operating systems, formal semantics, programming languages, complexity theory, and cryptography.

You’ll need to install Spoon.net’s plugin first but this is no big deal. Once installed simply click on one of the icons of the browser you want to test, if this is your first time launching that browser version it will download what I can only assume is the a local ‘image’ of that browser and when this is down will launch it just like any other application.

All in all this is an excellent site and well worth adding to your AdOps toolbox.

Downsides: Not supported on the Mac or on Chrome or on Opera from my initial tests.