Sometimes things that are supposedly free for the taking -- such as open source software -- can ultimately cost a wad of dough from the corporate coffers. That could well be the lesson Google learns from a lawsuit Oracle filed last year alleging that Google violated its intellectual property as well as infringed on its copyright for using a variation of Java. Details of the court filings surfaced in published reports recently, and they show that Google could owe Oracle between $1.4 billion and $6.1 billion.