Just point a link towards their results, and Google will give a nice and juicy backlink.
The cache is new :
This is G o o g l e’s cache of (URL above) as retrieved on 18 Apr 2007 23:45:09 GMT.
Ask.co.uk doesn’t have a valid robots.txt file, and the search results from Ask.co.uk don’t have a nofollow (not that they should’ve).
Enjoy!
Update: Here’s another indexed page from Ask.co.uk, and guess what ? It’s cache is from yesterday :)