I can confirm what everybody else in this thread has said and add one detail. I bought an HP 3055 all-in-one yesterday and after installing the software, not only wouldn't it scan ("waiting for PC..." forever) but it also wouldn't print, AND another HP printer elsewhere on my network STOPPED working.
After an hour on the phone with HP support (10 minutes just to register my info), the guy confirmed that there is no 10.5 driver, didn't know when there would be one, and added the following amazing fact. Not only does the software on the CD that comes with the printer/scanner not work with 10.5, it actually BREAKS its printing from Leopard (and similarly the 10.4 or earlier downloadable drivers from hp.com). He claimed that printing from 10.5 works on the 3055 out of the box, but if you are so reckless as to install the software that actually came with the printer, it permanently stops working. (Plus, apparently, stops the printing of other HP devices.)
He went on to say the only fix was to re-install the Mac OS âš . However, I can report that after un-installing every piece of HP software on my machine (using their uninstallers, not just deleting), then restarting, the printer now works, and so does the other HP printer on the network. (Scanning still doesn't work.)
Btw, echoing other complaints on this thread, the reason I bought a new HP scanner was because my old one had stopped working ever since (I think) 10.4, and I finally gave up.
