How deep can fund probe go? Insiders say there's lots more for Spitzer to find SAN FRANCISCO (CBS.MW) -- Investors need to brace for more shockwaves like the one that hit them this week, industry insiders say, because federal and state probes into mutual funds have just scratched the surface. <A HREF="http://cbs.marketwatch.com/news/story.asp?guid=%7BEAE3A5D2%2D5118%2D4631%2DA0DF%2D8F2CFD582BF1%7D&siteid=mktw" target="_new">http://cbs.marketwatch.com/news/story.asp?guid=%7BEAE3A5D2%2D5118%2D4631%2DA0DF%2D8F2CFD582BF1%7D&am...</A>