Reuters notes the emerging interest in acquiring online financial news source MarketWatch, with proceedings still in the preliminary stage. Whoever gets a hold of this organization gets a diamond that is hardly rough: with backing from Thomson, MarketWatch is bolstering its financial news coverage in an environment that is electronic-first and Web-grown all the way and becoming increasingly proficient at breaking financial news and feeding it to leading financial organizations via XML-based feeds. Anything's possible in this play - don't count out Thomson either, mind you - but probably the best fit here would be Pearson, which would pick up a nice real-time news creation and delivery team with a highly market-oriented U.S. focus that can complement its own more global, feature-oriented FT content. Put the two of those together and it spells Dow Jones - with an international Reuters-ish twist. The fun begins...