MediaPost is reporting that while social media companies and ad networks continue to win favor from investors, mobile marketing services don't have it quite so good.

In a new M&A report from Petsky Prunier, investments in mobile marketing tech and services have slowed significantly. The article said that holding companies and venture capital firms fed just $80 million into mobile marketing firms in the first half of 2008, down from $291 million during the same period in 2007.

"(Mobile) was the largest recipient just two years ago," Scott Wiggins, managing director at Petsky Prunier, said in the report. "As investors were perhaps hoping that 'if you build it, they will come.' But the infrastructure hasn't facilitated its use." Wiggins also said that even the new 3G iPhone wouldn't spark increased interest or investments from financiers in the short term.

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