Hey there fellow Xrs, I'm looking for an app...

I'd like to be able to determine who has a Droid phone from my contact list. It would be quite easy if I only had a handful of contacts but I've got hundreds.

So, without texting or calling all of them and then trying to add them to some kind of favorites list, I'd simply like to have an app tell me or show me with a symbol. It would be nice when using Droid specific apps like "TiKL" among others.

Please advise,
Thanks