Okay, I'll bite -
What are the best uke strings? Classical Guitar strings (see Grappler's post).
Of course, depends on the builder, and not necessarily the player.
2nd paragraph
http://www.ukuleles.com/Technology/strings.html
Of course, since Jake was mentioned
http://www.daddario.com/DADArtistDetail.aspx?CodaID=6115&ID=5
Here's the thing, do D'Addario's work for Jake, or Kamaka?
A little mongoose told me that MGM may be working on bringing in some high end Classical Guitar strings, packaged specifically for `ukulele. Don't get too excited, he probably won't be stringing $200 instruments with $20 strings. $2K instruments, okay, you'll probably see them there.
That being said, the best strings are the ones that work, for your instrument.
-Aaron