I neglected to mention in my post about installing the "Airport Express":http://ned.suckahs.org/archives/002317.php with a 3rd-Party router, (a "Netgear WGR614":http://www.netgear.com/products/prod_details.php?prodID=174&view=hm, in my case), that I still couldn't print wirelessly with the device. My "HP PSC-750 All-in-One":http://h10025.www1.hp.com/ewfrf/wc/genericDocument?lc=en&cc=us&docname=c00035369 isn't "supported":http://docs.info.apple.com/article.html?artnum=107418&sessionID=anonymous|12743518&kbhost=kbase.info.apple.com%3a80%2f... it makes sense that you wouldn't be able to _scan_ wirelessly, but why couldn't I _print_? Well, after a few more hours of searching, I finally found a "solution":http://discussions.info.apple.com/webx?14@145.NDUSaUAvt0f.4@.6897b310/19, courtesy *William Boddie* in the Apple discussions:

When queried for a printer, I selected "edit printer list" from the scroll down menu, clicked on "add" under the printer setup utility-> went to IP Printer -> Printer type "Rendezvous" -> Printer Address scrolled to "HP PSC 900 series" -> Printer Model "HP" ->model "HP PSC 950 Footmatic" -> press "add."

It worked, however the AX is easily the most frustrating Apple product I've encountered... let's hope that HP's partnership with Apple to co-brand an "HP iPod":http://www.apple.com/pr/library/2004/jan/08hp.html, will spurn HP to write better OS X printer drivers. My landlord is an architect, and he's mad that his $2500 plotter was rendered useless with his upgrade to 10.3... UPDATE... I neglected to mention that I am not using the bloated and shoddy drivers provided by HP. I would instead recommend the "HPIJS":http://www.linuxprinting.org/macosx/hpijs/ Open-source drivers. These drivers allows printing "over any available connection such as USB, AppleTalk, TCP/IP (via LPD and IPP), HP JetDirect, and shared windows printers via SAMBA". And, you don't have to install the useless extra HP applications, which are included with the driver package.