I currently have the 200MB data plan, and noticed that google maps have been the culprit in taking up all my data. is there a cydia app or another method that allows a portion/region of google maps to be usable offline?
not that I know of, you could use a GPS app like TomTom or Navigon for example, theses have the maps data already inside the app so no extra data charges...
Maps Enhancer was supposed to be sent to the repo months ago by @Oranav, but I have yet to see it and haven't heard anything about it in months, unfortunately.