2 cent take: While it may have been an epic build story to get LaTeX running on an iPad, I guess I gotta ask why not just install an iPad ssh client (iSSH, Prompt, etc.) and run LaTeX remotely? Or if you really insist on building a native client, why not one that talks to daemon on a system with LaTeX installed?

Viewing the output would be trivial: convert the output to PDF. For the ssh client case, push the PDF to a cloud file service like Dropbox. In the native client case, have the daemon push back the PDF for native client to render.