Pretty much - it's the thread diameter you need to look for - think it's 3/8ths of an inch.
Actually, found this whilst searching for that thread size: http://camerashop.itssystems.co.uk/acatalog/Slik_Tripod_Kits.html
It's usually a good idea to go with the same brand of tripod (thought this is not carved in stone anywhere). It's just the compatibility that is easy on the user.
Ok a really nieve question here but does any make of tripod head fit on any make of legs and vice versa?
Are the any exceptions?