In a recent post to his blog Phil Sturgeon mentions a service (cloud hosting) specifically targeted towards CodeIgniter users that's recently announced their private beta - CloudIgniter.
Ever wanted to install PyroCMS or set up a CodeIgniter playground but don't know what the hell you are doing? The wonderful new hosting service CloudIgniter does it all for you. The service is currently in private beta but I have been using it for a while and it seems perfectly stable.
Phil mentions one of the "killer features" of the service that puts it head and shoulders above other hosting - the one-click install of CodeIgniter-based applications (currently there's two of them). It also has a lot of the usual features like daily backups, automatic Google Apps MX records and pre-configured database installations along with the normal ssh/ftp sort of access. He also points out a "hidden gem" of being able to deploy your site with git as well.
If you're interested in trying it out, sign up for the beta and they'll let you know when things are all set up.