Through the 2008 season in the NFL, that is Brett Favre with 310 career interceptions.
Paul Krause who played for the Minnesota Vikings. He had 81 interceptions for his career.
Rodney Harrison of the New England Patriots became the first member of the so called 30/30 club (30 sacks, 30 interceptions) during the 2007 season. At the end of the 2007 season, Harrison had 30.5 career sacks and 33 career interceptions.
Brett Farve in 2005 with 29 interceptions
Baltimore LB Don Shinnick holds the record all-time record for linebackers with 37 career interceptions. Shinnick played from 1957-1969. Amongst active players, Ray Lewis leads the league with 29 career interceptions. Source: Playerfilter
You can check out all interceptions thrown by an NFL quarterback on espn. You have to check out the quarterback statistics and can look at all of the seasons the quarterback played. You can also compared various quarterbacks together.