MySpace accounted for 17.0 percent of online display impressions in June, up from May's 14.6 percent, but Yahoo Mail retained its lead with 35.7 percent of impressions, and MSN Hotmail was third with 7.2 percent, writes MediaPost, citing Nielsen/NetRatings AdRelevance figures.

Meanwhile, U.S. online advertising spend in the first quarter increased 46.4 percent compared with the year-ago period, writes iMedia Connection, citing Nielsen Monitor-Plus. Overall ad spend in the U.S. increase 5.6 percent over the same period. (Q1 advertising for the top 10 companies reached $4.6 billion, up 11.4 percent from the year-ago period. P&G led with an estimated $839 million in ad spend.)

The overall number of online display ad impressions tracked by Nielsen/NetRatings fell to 193.6 billion in June, down from 197.7 billion in May and 197.0 billion in April. Financial services companies accounted for the plurality of online ads - 24 percent, down from May's 28 percent. Telecoms and web media each accounted for 18 percent, compared with May's 17 percent and 13 percent, respectively. Retail goods and services accounted for 16 percent, same as in May.

Previous coverage:

- Financial Services Extends Lead in Online Ad Impressions
- Financial Services Up Online Ad Spend