The economy may be faltering, but that will not prevent online advertising from continuing to grow a healthy 23 percent this year, according to the latest eMarketer report. However, eMarketer’s latest report, which projects online ad spending of $25.9 billion compared to 2007’s $21.1 billion, represents a significant revision downward from the researcher’s November forecast of 28.5 percent growth for 2008. (PaidContent)