Most of Apple’s new iCloud services won’t be ready for consumption until the fall, when iOS 5 is released. But if you’re anxious to try out the iTunes in the Cloud service, you can get a head start by downloading a public beta version of iTunes 10.3 that’s now available from Apple’s Web site.

[ad#Google Adsense 300×250 in story]iTunes in the Cloud lets you automatically download new music, app and book purchases to all devices, rather than requiring you to manually synchronize content on each iOS device you own. So if you buy a new song or app on iTunes, you can start enjoying it on your iOS device right away, with that content synchronizing over the air.

The beta version of iTunes does not sport iTunes Match, the optional $24.99-per-year service unveiled yesterday that enables you to store your entire music collection in the cloud. That service is coming when iCloud and iOS 5 are publicly released this fall.