I really think it's a good thing do open the XSS scanning like this, definitely a good point Acunetix. What I don't really like though is the commercial points here. They are actually releasing the demo version with XSS scanning free for all websites (all other scanning are then limited to their test websites - which you shouldn't care about for any vendors).

Anyway, good point Acunetix! I wish lots of commercial will release some free tools or even their own little tools (SPI has a lot of good ones!)