Openmoko newbie dev questions

[Dan]

Hi -

I have just set up linux (xubuntu 8.04) on an old laptop. I'm an
openmoko newbie, hopefully you can help me with a couple of questions:

* I have followed Andreas Dalsgaard's tutorial [1] and the steps
1-to-5 seem to have worked fine, no complaints. However I don't have
an openmoko unit, I want to test the application on the laptop. I have
installed xoo and xephyr (from repository), and I think I have built
the calculator app (although there was no "bin" folder produced by
make; not sure where the binary is). So two questions, I suppose:
What's the quickest way to run the calculator app to check if I've
been successful?
How do I run the calculator app under xoo/xephyr?

* Another question: Do I need to worry about the difference between
2007 and 2008 (or other) versions of OM? The tutorial seems to use
2007.2

Thanks for any tips -
Dan

[1] http://andreasdalsgaard.blogspot.com/2008/07/openmoko-development-in-5-minutes.html