Hi,
it is interesting to see that you're investigating such interaction
techniques
here is a copy of the comment left on Atul's blog post entry:
Are you aware the Inky project by Rob Miller's team at MIT ?
In case you didn't hear about it :
"Inky (short for Internet Keywords) is a Firefox extension that
provides a sloppy command line for the web."
http://groups.csail.mit.edu/uid/inky/index.html
The UIST 2008 paper (probably not the final version) :
http://groups.csail.mit.edu/uid/projects/inky/uist08-inky.pdf
an older web page :
http://groups.csail.mit.edu/uid/projects/inky/
----
As a side note, are you aware of any study showing when do people
change from mouse to keyboard ?
Most people use mouse to browse the web since it is much easier to
click links than circulate in them with the tab or '/' + search keys.
Knowing when do people use the keyboard while browsing and when are
they ready to switch from mouse to keyboard, could help focus
ubiquity's design and define which types of commands should be
included.
Regards
Aurélien
http://www.lri.fr/~tabard