hlc right here has plenty of info.. where you will quickly see that hp and epson are quit linux friendly.
the reason tho in general that manufacturers are hatefull towards linux is because--- of money (duh).
they fear the wrath (foolishly) of m$ more than how linux will someday soon be their bread and butter (or they will starve).
this kinda thinking has been burnt into whole generation of users as well as... (hi, i'm halvy, i'm a recovered m$ user