From Alessandro, the Forum Nokia Online Flash Lite Packager is back.
It's not exactly the same (you can't package to NFL nor choose the S60 version) but you can download the generated source and choose you own UID.
I got a 404 Error (doh!) trying to generate a test sis but I was able to download the source.
I find one MAIN problem :
I already fight with this problem so, for now, I'll still use my own packager.