How many of you have started using micro SD cards? If you have, what is your experience? If you haven’t, why not? I recently started using the micro SD cards from Sandisk after avoiding them forever. I just figured, they’re so damn tiny, they had to be annoying. But after using them, I’ve found them pretty darn useful and even though they are obscenely tiny, I’m sold.

They are especially useful for moving songs betweens between your MP3 player and phone. (Assuming you have the micro SD slot). Say you have an 8 GB MP3 player. An 8 GB card doubles your storage. That’s a no brainer. But the fact that you can take the card out and use it on your phone or other device is where they are handy.

We checked out Sandisk’s new slotRadio recently. As a refresher, this player comes with a microSD memory card slot so you can have your choice of pre-loaded music. The idea is that you can get it pre-loaded with Billboard hits cards that hold more than 1,000 tracks and buy other similar cards.

Did we like it? Did we hate it? Is it filled with useless songs that are all played out? You’re about to find out.

Who doesn’t love iPod? Okay, before we get into an all-out brawl, let’s say that question was rhetorical. But whether you love or hate Apple’s ubiquitous MP3 player, you can’t deny that it’s everywhere these days. With the new 4th Gen iPod Nano, things get even more exciting. The new design allows for a larger viewing screen for movies, photos, and Coverflow, without the wideness of the previous generation. Apple also switches up their usual pricing standards with this generation, offering a 8GB model in all colors for $150, and a 16GB model at their usual price of $200.

The new Genius feature claims to find songs in your library that go together, and groups them for you, taking all the work out of creating playlists. Of course, the shuffle feature may undo all of that work. When shaken, the iPod switches to shuffle mode… so let’s hope you don’t move too much when you jog, or your exercise playlist may suddenly switch to slow jams. Luckily, this feature is one that can be disabled if you’re not interested in using it.

Sony is revamping its Xplod line of car stereo units that will work with iPods. The iPod-aware models are the GT630UI, GT430IP, GT330 and GT130, and each features a USB connection that transfers data and charges the iPod.

These are the first models of their kind that feature scan technology known as “ZAPPIN”, which will do what auto-scanning does for radios, but for your digital content. So, using it will play samples of each track in a given piece of the listener’s library so you get a taste of songs, rather than text descriptions. If you want GT630UI you’ll have to pay $160, while the GT430IP and GT330 will cost $130 and $100, when they’re released in September.

Sony Ericsson continues to expand their Walkman mobile phone lineup and feature list by now adding the Walkman W580. The W580i sports the Quad Band EDGE (850/900/1800/1900) connectivity along with music playback, and this time Sony Ericsson has added some additional new features to help with your outdoor exercise routine.

The new mobile phone supports Disc2Phone software to transfer music to an internal 12MB of storage which can be expanded with a Memory Stick card, and TrackID will identify unknown songs whether they are downloaded or even recorded off of the built in FM tuner. …

XM Satellite Radio has a product called inno which is an MP3 player and live satellite radio player in one. The key to this is the live part. With this product you can listen to live satellite radio through XM Satellite Radio and record up to 50 hours with one-touch recording.

This also has a built in FM transmitter, so you can listen to whatever the Inno player is playing using an ordinary FM radio. Also, it’s integrated with XM and Napster which allows you to manage songs, playlists, …