Is there a site that lists the A-League leaders in goals, assists, goalkeeping, etc.. and is current?
Once again, Father Dan's website comes to the rescue. This link on A-league.com takes you to the USL news page. On the right, there is a grey box with several more links, individual stats, teams stats, etc. You can go from there. They were current as of 8/13. http://www.a-league.com/league_news.shtml
A good site to look at league leaders is on rhinossoccer.com. http://www.rhinossoccer.com/leagueleaders.asp