You want to view EPS files on your iOS device? Look no further, »EPS Wizard« is the right app for this job. It extracts the included preview of EPS files. You can zoom, scroll - just like you are used to from Apples Photo app. You can even change the background color from black to white or gray to accentuate the image.
»EPS Wizard« is a so-called viewer app, so you can send files from different apps to it and view them. This works from Mail as well as web browsers like Atomic Web or general purpose programs like Air Sharing and the like.
Lease note that »EPS Wizard« shows the integrated preview of EPS files which Adobe has described in its "Encapsulated PostScript File Format Spezification" (Version 3.0). Programs like Adobe Photoshop or Illustrator can create such EPS files.