Dexterb007 has got a point there. Google should penalize any domain unless it has been noticed to be involved in fraudulent activity. Just for the sake of your project - .com domain would produce a more trusty impression.
sachy24, really for me if .com and .net are already registered then try some other domain name instead getting .info or .biz. I think it won't look good if something else is going on .com domain and your site on .info domain.
Avoid .info domains. Most sites using .info domain names are spam sites. Whether or not Google penalizes it, some of your customers/clients will certainly think twice about buying from a site with a .info domain.