ComiXology is more than just an iPhone comics distributor. Their services run the gamut from doing pull lists and lots of commenting, previews and other features. It is a pretty full-featured company of which downloads are only a small part.
You can visit their website at www.comixology.com for more info, or you can go to the iTunes store and download their free reader app. SLG actually has a lot of free (yes FREE) content available here, so it's well worth a visit.
