Johnnyv - i thought the same thing - I have 1100+ songs, I made many changes to after the initial sync to album names, artwork, deletions, adds, etc.... So how does itunes know what changed? It doesnt. I deleted the whole playlist in itunes re-added the folder with all my music. Problem here, is it deleted everything off the BB and readded it taking 2+ hours. I think Itunes and this sync thing work good on the initial load, as it created a file structure on the BB automatically, but going forward I intend to manually add/delete, etc and changed items without the software.
Trust me folks, I tried this many different ways, and you should only use this tool to get the initial load on the BB.
"It is like stealing candy from babies!", Kenny Brack after winning Milwaukee, 2001.