No chrome? Hmmm..just checked the Sony site and I guess I see what you mean. Damn, who wants to pay extra for Chrome on a PS3? LOL.
The 80GB does come with CompactFlash/Memory Stick/SD slots whereas the 40GB does not. Not sure how this really matters, but I'm sure there is a use for it.
Wifi works on both, it's how I'm set up on my network.
Really, if you can still find it anywhere, the 60GB is what you want as it has the extras of the 80GB (maybe not Chrome though, sorry bling-boys! :wink
without the extra price tag. Pretty sure they are all gone though.
Here is the page from Sony's web site with the specs for each.