The last thing the world needs is another rant by some snooty music scribe who actually believes he can peg the next Coldplay or validate some MySpace wannabe. Don't worry; yours truly doesn't make any such presumptions. You won't find any holier-than-thou prognostications here -- just good new sounds worth checking out in the pop/rock/roots/Americana/singer-songwriter/whatever vein. These artists fly well below the radar, but here's some help with tracking their trajectories.The Matthew Herbert