Update 1: See additional options in the comment section.
Federico Barocci, Aeneas' Flight from Troy, 1598, Galleria Borghese, Rome
Wikimedia Commons
An overview of The Aeneid in English is here.
Online translations are mostly by Dryden. They come in various versions:
- The Perseus Digital Library
this also has the original Latin - Ancient/Classical History at About.com
ditto with Latin - Google Book
- Internet Classics Archive
- Project Gutenberg
Project Gutenberg with all the options
A Project Gutenberg version can most likely be downloaded for free on the iPad also.
Other online translations:
- Theodore Williams translation at Perseus.
- Modern translation by A.S. Kline.