Yeah I know it’s been discussed before, but I could’nt locate the thread 
I just got Tiger for my portable and I found and downloaded the 1.5 update 1 runtime.
I can’t however seem to find the SDK. Is it available yet?
If you mean the developer docs - yes they are availble. On Mac there is no SDK, or rather there is no JRE-only… you ALWAYS get the SDK, but you don’t get the source code and the docs unless you download the developer docs.
http://www.apple.com/support/downloads/java2se50developerdocumentation.html