Although the number of downloadable podcasts grows daily, some radio programs are still only available as live or archived online streams. No problem. Several pieces of software can help you record Internet streams and over-the-air radio, just as you can record TV channels with TiVo.

RadioTime: This is a subscription Web-based service (seven-day free trial, then $39 per year, Mac or Windows) that allows you to customize a TiVo-like programming grid of all your favorite online radio stations and what's on them right now or in the future. You can set it to record a program only once, every week, or every day, and you can choose from many stations playing the same program at different times. For an extra $20, they'll send you a USB antenna that allows you to record local FM radio as well.

(Warning: I've found RadioTime software to be a little balky at times, but it's getting better. After some trial and error, you can usually get it to do what you want.)

Replay Radio: Replay Radio (Windows only) is a stand-alone piece of software available for a one-time charge of $49.95. It lacks a lot of the updated programming information that RadioTime offers, but it's great when you know the address of the stream you want to record (including audio archives).

Note: I regularly use both RadioTime and Replay Radio, because each has features the other lacks.

Radio Shark: This stylish piece of hardware from Griffin Technology ($69.99) will record both FM and AM radio stations onto your computer (Mac or PC) for later listening.