Music caching feature is now enabled for the iPhone's Slacker Radio app

Jumping up to the same level that's seen on other mobile platforms, the Slacker Radio App for the iPhone is now enabled for storing songs locally on the smartphone. The service is known for its ability to stream music direction on the handset, but iPhone owners won't need to worry about losing network coverage which can halt your tunes directly in its tracks. Unfortunately it's not something that's going to be given out for free as it requires a paid subscription for Slacker Radio Plus – which will cost users $5 per month out of their pockets or simply $48 for a full year of service. Nonetheless, it should prove to be a neat future to keep tunes constantly happening on the handset even in those situations when you're out of coverage.

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source: iTunes via Phonescoop