I'm working on something VERY similar to this actually, so I'll refrain from any critiques in lieu of just saying "I'd do some things differently." Regardless,

I'm working on something VERY similar to this actually, so I'll refrain from any critiques in lieu of just saying "I'd do some things differently." Regardless, it's quite nice, and I'm already very jealous of how quickly you're doing the bulk lookups. It is much faster than my implementation. There's a surprising amount of overlap, which tells me we're either both very right in a lot of aspects, or both very wrong. I'll take the optimistic route and figure we're both doing things right. Best of luck. It's certainly a needed tool (IMHO).