Also present is Timescape, one of Sony Ericsson's two big ideas for the Android platform, which draws together your contacts and social networks both on-board and on-line. Dave Oliver has already given Timescape the once over in his review of the Xperia X10 so I won't bore you with repetition though I must say I found the white text against pale Facebook and Twitter image backgrounds rather hard to read on such a small screen.
SE's other big idea, Mediascape, is absent in its full form but you do get the same Infinity button to access artist-related YouTube content directly from the music player. I found this a surprisingly useful feature, as I did the Mini's ability to play H.264 videos at resolutions up to 480p.
The Mini's 5Mp autofocus camera has a basic control interface - all you get are options for Auto, Macro, Twilight and Sports - but it comes with an LED lamp for close up low light work and produces some perfectly reasonable images for a mid-range smartphone, as the sample snaps illustrate. The turnaround time between shots is also impressive: around the 2-3 second mark.
X10 Mini Pro
I bought one of these at the weekend and it does have a user replacable battery, as well as the physical keyboard and is only £20 more than the Mini.
The tiny screen is remarkably usable and the form factor is such that you don't notice carrying it around.
You say the X10 mini is "free with contract" from several providers. This is a contradiction in terms, and it is definitely not free -- the monthly costs are increased over standard contracts so as to cover the cost of the phone.
If you want to mention a price, mention the minimum total cost during the contract period. All other prices are suspect, and "free" most of all.
picked up a mini pro on monday...
Really good phone, one thing to consider if you pick one up (a pro) is that it doesn't have any sort of prediction or spellcheck.