Could we have a similar [1] diagnostic-script/tool for checking client-side settings (operating system, java-version, browser/browser version etc.).
Which would give out some same kind of information as the 'opit-tool'?

[1] http://content.opit.wsoy.fi/bh_sivut/browserhawk.asp

I don't think we would need nearly as much information as in the example below, but some could be useful...

Example data:
****************
User agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.6) Gecko/2009011913 Firefox/3.0.6

Browser type and version: Firefox 3.0.6
Browser build:
Platform: WinXP
Cookies supported: True
Cookies enabled: Enabled
JavaScript supported: True
JavaScript enabled: True
ActiveX enabled: False
VBScript enabled: False
Java applets supported: True
Java applets enabled:
Java Version: 1.6.0_11
Java Vendor: Sun Microsystems Inc.
Screen size: 1440 x 900
Browser size: 1428 x 715
Connection type: Not detectable with this browser
Connection speed: 6924449 bits/sec (845.27 KBytes/sec)
Color depth: 16.77 Million Colors (32-bit True Color)
Flash: Version 10 (version 10.0 r12)
Shockwave: Installed (version 11.0)
MediaPlayer: Installed (build Not tested or result unavailable)
RealPlayer: RealPlayer 10 installed (build 6.0.12.46)
Acrobat: Not tested by default
QuickTime: Installed (version 7.5.5)
Browser time: 10. helmikuuta 2009 20:47:31
Time zone diff: No difference
Firewall: False
Proxy:
Proxystring: