Six signings are Rychart, Holmes, Forman, Hill, Nash, Cooper (not announced on the Sixers site that I saw). Nash's contract has an element that says that if he misses a certain number of games due to a back injury, the Sixers don't have to pay out the contract. Nashy is very confident of his recovery (see SEABL stats as proof) and has put that on the line with the contract which is very admirable.
The seventh signing referred to, I would guess, is Maher's verbal agreement to return if he doesn't receive a better offer prior to signing a contract. As I mentioned last night, this is because the club are not permitting Euro out-clauses, so Maher is forced to test his worth before signing. "Forced" makes it sound bad, but I guess it's just what is going to happen if the club wants that security of not losing players to Europe.
Willie is surely looking for somewhere to settle with his family. If he naturalises, you have a huge asset to your team. How is the same salary this year, plus a boost for year 2 and year 3 not acceptable to the club? The guy was almost league MVP!