Are you looking for something different than a CRM? Typically people will scan the business cards they get from a tradeshow with something like Worldcard and import the CSV into whatever CRM their organization uses.
For all intents and purposes I suppose I'm looking for a minimalist CRM. By virtue of being extremely early-stage (looking for co-founders and investors) the simpler and cleaner the interface the more it will suit my needs. Perhaps I could roll my own SugarCRM with 95% of features turned off, but I think there has got to be a turn-key web app that fits the bill out there somewhere.
Oh I see... well right now our focus is in sharing contacts easily and keeping the parties connected. We do provide an organizer that is powered by search, ex: "PHP developer" will find contacts that has PHP development skill-set. What's interesting is you may have never known that person is a PHP developer until now.