San Diego-based StockTwits, the online, real-time stock discussion site run by Howard Lindzon, said today that it has seen a spike in its usage on its site. The firm said it has seen an increase in message volume on the site grwo by 227 percent over the last 12 months. The firm attributed the increase to adoption by both investors and companies, who use the site to disseminate important company news. StockTwits site allows users to interact with real-time messages around certain stocks. The service is similar to micro-messaging site Twitter, except filtered and centered around publicly traded stocks. Lindzon is known both for his angel investing activities, as well as for founding Wallstrip, which he sold to CBS in 2007.