A mild concern of mine with the "Google, if you’re listening" annotations. It's worth remembering that Chromium's an open-source project. If you really want something, send a patch.
I can either try to submit a patch and likely fail, or blog about it. Last time I complained to Google about Chrome, they filed 33 bugs and fixed many of them. The point here is to be an agent of change, not an agent of patches :)
But this is still a valid point in the sense that Chromium is run much more in the spirit of an open-source project than other large-scale commercial open source efforts. External patches do make their way into Chromium.
Aside from the obvious - branding and stability - It's mainly the commercial stuff (MP3, PDF, Flash) which can't be distributed under Chromium's license.