Nice way to return
First off, I'm thrilled that you've finally posted some new material, and that while it has that certain similarity with your other songs, it still stands out as its own song. Secondly, I'd like to ask you if there's any way I could get my hands on more of your songs (MSN? E-mail?), I'm positive that you've been asked this before, but I thought I'd ask you first rather than simply sending you a random e-mail.
Anyways, back to the song. The bass is very catchy, and I found the melody that comes in a bit later to be one of your better ones, the ambient noises in the background add a cool feel to the song, and make it sound much fuller than had they not been there. The only problems I can see with this song would be how it's a tad repetitive, the bass may be great, but it's played for the entire song with little variation. Also, the melody that comes in is short lived, as with the rest of the song.
Nice to see you're still making music, keep it up. :)