I’d like to add some more variety in the Art Objects in my campaign, anyone know of any websites and/or books that further explore Objects of Art as treasure?
Seriously, the main difference between Phil Reed's offering (which Crothian linked above) and mine - and Phil and I have discussed this - is that Phil gives you 101 "ready-made items" while my work is more of a "cookbook" that allows you to cobble your own stuff together. They are nice complements that don't overlap much, but depending on what you're looking for, one or the other may better suit your needs.
Sorry, Sigil, I forgot about yours. I knew there was another product but I just couldn't recall who did it or what it was. Both are good and and have their strengths and weaknesses. So, I suggest buying them both
I purchased both .pdf books, and while I've only had time to make a cursory glance through them so far, I can see both will provide some great material for my campaign.
I also found a website that has some good ideas (its not d20 specific, but it has some good lists).