There have been a lot of comments and emails asking about Isabel and her apparent death. Hopefully we can clear this up finally.
At Comic-Con, Damon Lindelof stated that Isabel was deceased when showing a clip from the S3 DVD. It was also mentioned in the Podcast that you can hear HERE. She was killed as part of the raid on the beach along with Pryce, Tom and Aldo in the Season 3 Finale.