Caching and storage providers aren't going to help you with latency questions, only with community performance. Resource caching, on the other hand, configures your community to work with a CDN, and is exactly the thing to help improve internet performance. You will need to have hosting agreement with a CDN provider. Jive has a partnership with Akamai. I would suggest you contact your sales rep or Jive support if you are interested in exploring this further.