Since making the software available, I've had a lot of questions about the software, most of them redundant. For this reason I've initiated a discussion group in order to efficiently support the ComBat users. Before you download (or if you have any questions) please join the dChip discussion forum at: http://groups.google.com/group/combat-user-forum specifically dedicated to ComBat users. Thanks!
Currently, ComBat is only available as an R script. You can download it by clicking here, and then pasting the code into a text editor. Name this file 'ComBat.R'.
Please check the 'Usage' page to get help on what to do with this R script!