Los Angeles-based venture capital firm GRP Partners said today that it has made another investment in the Twitter ecosystem, and has led a $6M, Series A investment in Datasift. Datasift is a provider of real-time, analytics and management tools for third party developers and companies. GRP was joined by IA Ventures in the investment. Datasift is based in the UK. Mark Suster, who led the investment for GRP Partners, explained that he is "doubling down" on the Twitter ecosystem via the investment. Suster also led GRP's investment in Ad.ly. IA Ventures' Roger Ehrenberg was the co-lead. Both Suster and Ehrenberg have joined Datasift's board of directors. More information »