I have the baby brother of the Ixus 220 HS (the Ixus 115 HS) - some pictures
here (the 8 photos taken before the one in the link are all with the Canon Ixus but most of the ones after are all with a Sony Nex, however
this album and
this one are all photos taken with the Ixus 115 HS.
I love it and it's biggest advantage is the tiny size - I take this camera everywhere. With hindsight though I wish I had got the 220 HS instead as it's the same size (in fact a fraction smaller I think???) and the 24mm wide angle would make a big difference/be a lot more useful compared to the 28mm on the Ixus 115. Otherwise I think the cameras are very similar spec and £110 for the Ixus 220 HS (after Canon cashback) is a bargain. Lots of fun features too like the diorama (miniature) effect (
example) and the slow mo and high speed video (
example, not mine).
Weak points -not the best lcd screen (but usable), pictures could be a little sharper (it is a tiny compact camera though). Not much else.
The TZ8 has a much larger zoom (25mm to 300mm) so if you think you would use that then it may be a better option (especially for wildlife: birds etc). I mainly shoot portraits and landscapes so don't really miss not having a long zoom (and happy to sacrifice one for portability). TZ8 is quite a bit more bulky than the Canon.
The S95 is a great price now and better image quality than the SX 220 - but yes it is still more expensive at twice the price and also a bit more bulky than the 220 HS.
By the way,
Jessops has the red 220 HS for £129.95 (before Canon cashback) which is
the same price as amazon, but Jessops throw in a free memory card and there is also a tiny bit (about £1.50) of
cashback via topcashback if you are counting the pennies.
Lots of sample photos of the Canon 220 HS (also called Elph 300 in the US) in
this flickr group.