After 5-months of waiting for a response from HP, this is what I received from HP Tech Support yesterday:
Hello ,John
Thank you for contacting Hewlett-Packard's Commercial Solutions Center.
John we understand from your e-mail that you are concerning about the new driver for your CLJ 2840 with the new operating system
Jonh unfortunately the driver for that printer model is not ready yet. So we truly apologies for this long wait and hopefully soon will be on the HP's web side. However, you can sign up in the following link to get an alert when the driver will be there
https://h30046.www3.hp.com/subchoice/country/us/en/subscribe.aspx?subs=DRIVERSIG NUP&jumpid=em_sc-gen/us/jul07/all/xbu/signup/mrm/mcc/loc/xbu/bscdriverpage?lang= en&cc=us&prodSeriesId=445194&swEnvOID=219
We apologize and truly regret the long wait and the frustration this matter may have caused you.
Once again, thank you for contacting Hewlett-Packard's Commercial Solutions Center.
Regards
Liz
NOTE: Our advice is strictly limited to the question(s) asked and is based on the information provided to us. Problems and solutions may depend on the nature of your system environment and various other parameters that are unknown to HP; therefore, HP cannot assume any responsibility or liability. Please be advised that technical information changes as new data becomes available, therefore, HP recommends that you check back at our technical support web site located at
http://www.hp.com/country/us/en/support.html regularly for possible updates. Hewlett-Packard shall not be liable for any direct, indirect, special, incidental or consequential damages in connection with the use of this information.
HP should not be allowed to remain in business with such poor customer support.