Actually, I would say this is more thanks to ScummVM (an open source re-implementation of many adventure game engines), as well as the people who ported it to iOS. The last three games listed probably use ScummVM without modification (citation needed), and I would be surprised if the Broken Sword and Monkey Island remakes were not heavily inspired by the efforts of ScummVM to revitalize interest in the games.

I thought that ScummVM was GPL. Doesn't that run against Apple's rules? Wasn't there a case of a 3rd-party dev team in Europe embedding ScummVM into a Wii game for EA (or some large name) and it had to get pulled due to Nintendo's licensing rules (which conflicted with the GPL).

Apple wouldn't allow a ScummVM app into the app store (that it would play any ScummVM game), but games made on ScummVM platform are ok.

I thought it was a matter of licensing, not a matter of 'something that can run code.'

Yes, you're totally right! ScummVM was a great part of this, as well. I remember getting an otherwise shitty Nokia phone in 2006-07, only because it could run ScummVM (iPhone wasn't even in the rumors then)

You may also enjoy Scarlett and the Spark of Life, which was made specifically for the iPhone:

http://launchingpadgames.com/games/scarlett/

(Disclosure: I'm one of the developers.)

Thanks, will definitely check it out.