EMARKETER — Overall, US business-to-business (B2B) advertising and marketing spending will increase by a tiny 0.8% this year, to $129 billion, according to Outsell’s "Annual Advertising and Marketing Study 2010." Interactive spending will climb a more encouraging 9.2%, to $51.5 billion. B2B marketers will increase spending on some interactive tactics significantly more than average. Marketing spending on social networking sites is predicted to rise 43.3%...

GIGAOM — When it comes to apps, the iPhone platform is now bigger than the Facebook platform, according to a report by Flurry, a San Francisco-based mobile analytics company. Flurry said today that Apple’s iTunes App Store has over 140,000 applications compared to 60,000 apps available on the Facebook platform. "Since the App Store launched in July 2008, 35,000 unique companies have released applications, which translates to 58 new companies launching apps each day," Furry said in its Smartphone Industry Pulse report for February 2010...

THE GUARDIAN — Twitter's growth seems to have lost its momentum, according to a new study. Growth in the micro-blogging service's number of users peaked at nearly 20% last April, but had dropped down to 0.15% in December 2009, says a study by Barracuda Networks. Recent web analytics had already suggested that Twitter had reached its peak, as Twitter.com recorded a traffic high in July 2009 and has never reached that level since. According to Compete, Twitter reached 23.5 million users in August 2009 and stayed put. However, as Twitter client applications have grown and have become a bigger percentage of Twitter's user base, the numbers didn't necessarily reflect the actual situation of the micro-blogging service. By using the growth in Twitter users, instead of the site's traffic, the Barracuda study now puts things into perspective...

EMARKETER — US marketing executives were much more optimistic about the economic outlook in February 2010 than they were the year before, when the recession was in full swing, and many were planning to increase budgets, according to the “Marketing Trends Report 2010” from Anderson Analytics and the Marketing Executives Networking Group (MENG). But they have become even more focused on getting a good return on their marketing investments. Anderson and MENG found that “marketing ROI” had jumped to become the most important trend to marketing executives. Social media cracked the top 10 this year, when 72% of respondents were planning a social strategy...

MARKETINGPROFS — Unprecedented change brought on by a volatile economy and the rise of new marketing channels is creating opportunities for marketers—and leading the way for widespread adoption of emerging tactics such as social media, rich media, and mobile marketing, according to a survey of online and direct marketers by Unica and Salloway & Associates. Over eight in ten marketers (84%) use or plan to use at least one emerging marketing tactic (social media, rich media, or mobile marketing) in the next year. Among marketers, 47% now use social media for marketing, and 23% plan to use it in the next 12 months...