Also it can only find 3 albums for Slayer, none of which were released this millennium...
Other than that this is a great idea and nice looking website.
The service shows you albums from the last 5 years but that could also include re-releases (which might explain the Slayer weirdness).
Thanks for trying it out and the compliments.
You are right, it links to what looks like 2009 re-releases for those 3 albums, but it still doesn't have their 2009 actual release...
That's ok, keep up the good work, will be even better when you integrate last.fm!
I'll look into the missing album though, edge cases like that are handy to know about for data quality.