Great tip, Jason. I don't know if this is exactly the kind of "prop" you were talking about but I think it uses a similar psychology so thought I'd share. I can't remember where I even learned this but I've never forgotten.
A red folder... That's it... lol
Whenever you go into a meeting, bring a red folder with you. It can be empty, it doesn't matter. For some reason, it "commands attention", and all eyes and ears will be drawn to you because everyone's wondering what's inside. It must be important or urgent to be inside of a red folder. So, I was thinking, maybe something like this would work at a networking event as a "prop". Walk around with it and maybe people will key in on you and remember you more (maybe even approach you ... hmmmm, there may be a future experiment in this ... lol

).
When I got laid off from the corporate world, I bought a bunch of red folders (more of a deeper red than a primary color) and put my resume, references, letter of recommendation and a copy of my college diploma inside (now that I think about it, that was probably a little over the top but for some reason I thought it would be a good idea...lol). If nothing else, it made me feel a little bit more professional...lol