I've recently discovered LXLE (on a Linux Format DVD...) and found it's just the job for replacing XP, especially on older or more limited hardware.
I replaced Widows 7 Starter with LXLE on my daughter's Netbook, and she was delighted with the speed and ease of use. I can't see any rough edges, although it's based on Lubuntu that some here say is rough, and it looks and performs really well. 15 minutes of showing her round the OS and she was sorted. The upstream base is Ubuntu LTS - currently 12.04, with 14.04 LTS rather well timed for XP EOL?
It's a very young distro, but looks to be well worth trying for all those XP machines out there. The download ISO (which even comes in 64 bit if needed) is a Live DVD. Apparently LXLE stands for Lubuntu eXtra Life Extension - well named.
Although I use Mint on my main machines, I'll definitely be leaning to LXLE for those customers who'll need help moving from XP before April 2014 and beyond.
Anyone else tried it?