I agree to almost everyone here and I am with them in discouraging you from going to tradeshows for business. Think of it this way almost every company present there is to sell and acquire new customers and build a brand nameand not there to find a vendor . So when you go and sell to them in a trade show most cases its a direct clash. I will not say it does not work at all . It has worked for me ocasionally . I will say may be 1 in 20 shows I go to , I get a lead but not worth the time. Go to trade show to get the feel and pulse, get market intelligence of the companies you want to sell to and not for direct business
I have had limited success doing sales at most trade shows as the decision maker is generally not there. I use trade shows largely for intel -- scope the competition, learn about markets, analyze industry trends.
Personally, in the Tech industry, I don't think the trade show would help a company at your stage. IMO, you'd do better if you used a source such as Hoovers (there are many more) to target your "named customer," e.g., CTO or Director of Marketing, etc., via mail, email, or phone call(s).
You'd do better by giving a talk, organizing a panel discussion, or organizing a track for the conference. That way you'd start establishing yourself as the expert. And your marketing team can get additional mileage from your involvement, particularly if you are giving a talk.
All in all, in my experience, a good, well-informed, and helpful blog that addresses your customers' challenges is the best way of generating qualified leads for a startup.