If its a lagit launch and therefore genuine news then consider doing a real press release through somewhere like PR web, they normally get shot around a couple of hundred syndications and will help create that perceived "buzz" around the brand providing its done along side other marketing techniques. Consider doing it at the same time as other promotional methods such as adwords, facebook, twitter campaigns and authority niche blogs and offline promo's.
Ultimately every plan is hugely dependant on budget and time available. When you say "article" in singular, you'd be hard stretched to judge what your expecting to achieve from that one article, the days of scatter gun effects to article directory's are long gone and never really worked back when the masses latched on to the latest trend.