Spam could jeopardize mobile carriers' plans for injecting marketing into their services.
Internet advertising, mostly from text-based ads, reaches an all-time high for the first quarter.
InterMute plans to offer a new tool that will let Web surfers block text-based ads from appearing in a Web search, so that noncommercial results come to the fore.
A federal commission says senders of text-based political ads don't have to disclose who funded them. Could this lead to anonymous political spam?