As this site mentioned this morning, there have been 9 teams so far this year who have faced Craig Biggio but not hit him with a pitch. The Astros have faced 10, and only the Marlins plunked Biggio. But, every one of those teams will get another chance at some point this season so the question remains open regarding how many teams will fail to plunk Biggio in the 2007 season.
Last year, Biggio faced, but was not plunked by 13 different teams, which was a career high. In 1988, when Biggio first joined the league (and Hunter Pence turned 5), he didn't get hit by any pitches, but their were only 11 teams in the NL that year. 11 teams throwing toward, but missing Biggio all season remained the record until last year, although that mark was tied in 1999 and 2000.
Biggio has never been plunked by every team he faced in a season, but in 1996 only the Braves failed to plunk him. In 1997, he was hit by every team in the National League, but that was also the first year of interleague play, so the Indians, Twins and Royals were all on the schedule and failed to plunk Biggio. He did get hit by the White Sox and the still-in-the-AL Milwaukee Brewers that year, for his first interleague plunks.