This free Web Page Security Check service seems useful and fast. Just enter the URL of a site, and get a fast report back identifying any potential malware nasties buried in the code. Useful for pre-checking some of the more…ahem…suspicious foreign sites perhaps?
The developers are upfront about saying it’s not a sure-fire solution, and recommend other tools you can use, which is good. Definitely one for the toolbox (alongside the excellent Virustotal for checking individual files for malware.)