These are probably silly questions, but I'm still learning.

1) When using wireless connection how do you connect from one computer to another?

What do you mean by 'connect'? You can share

* Files (see the 'Sharing' pane of the System Preferences)
* Photos (see iPhoto preferences)
* Music (see iTunes preferences)
* Printers (see the 'Sharing' pane of the System Preferences)

amongst other stuff.

2) I can't get the airport express to be "seen" at all if I plug the printer into it. 3) So, if one laptop (my powerbook) is plugged in to the usb printer, how can my husband, using his ibook share the printer?

Open the System Preferences and click the 'Sharing' icon. You should then be able to share the printer from your powerbook. Your husband should be able to add it from the 'Printer Utility' application on his iBook.

Have fun,
Shay
--
=========================== Shay  Telfer ================================
 Perth, Western Australia   Technomancer  Join Team Sungroper in the
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 http://public.xdi.org/=Shay    fnord     <http://sungroper.asn.au/>