I am in vintage Libbey glass resource heaven now that I have discovered Libbey History! Up to now I have relied on eBay and replacements.com to research Libbey glass patterns. Sometimes I come up empty on both accounts because I find a pattern that is not common, hasn't sold lately, or has an official Libbey name completely unrelated to how I would describe it.
I am especially gaga over their amazing catalog page. I don't want to admit the hours I have spend this week looking at them.