Are new episodes of this show being produced, or is it just reruns?
It ended it’s run in 2008.
According to Wikipedia :
NBC’s early presentation of its next season schedule on April 2, 2008, did not include the show. However, network executive Ben Silverman said that it might still return.
On Tuesday, November 25, when NBC announced their Midseason schedule, 1 vs. 100 was not on it and a report for NBC said there are no plans to bring back 1 vs. 100, likely meaning the show has ended with a series finale, however, a report from Buzzerblog announced that with Endemol doing a TV adaptation of the game 20Q for GSN, 1 vs. 100 may come back.
That report was from last April, however, so the rumors may have amounted to nothing.
Although the season is ending this Friday, there will likely be a 3rd season of 1 Vs 100 Live on the XBox 360 in the next few months. It is free to play to all Gold subscribers, with prizes paid for via in game advertising.