Share your experience!
CoolDesign started one of these for the Mini, although I love my phone I thought it was a good idea so decided to start one for the Mini Pro (2011 version). Check out the other thread too (http://talk.sonyericsson.com/message/107847#107847) as I'm sure alot of features will be shared, I've copied some into this thread.
Please post enhancements only, not bugs or issues with your phone... unless of course it is something that needs enhancing! I'll try to copy them into this post to keep them all at the start.
Added (25/10/2011):

** Just to add uliwooly-wooly posted some useful apps which provide this functionality (the starred items). See here and here or scroll down.
Solved! Go to Solution.
No problem now... sorry...
Something to do with my SD card tweaks... It was put by default on 200 kb/s...
I put it on 4000 kb/s and it's ok now...
Ok, great!
I guess you are having 'more fun' with your phone. 
Well smartphones can do a lot of things when you unleash its full potentialXD
Guess so .... just be careful, it can go either way. 
No problem bro... Besides my memory card is Sandisk class 4 so it should perform at 4 mb/s
Oh ya... Sony can you put battery percentage on the battery icon?
Perhaps you can make a new icon like a rounded one with the battery percentage in the middle?
Cause I've run custom roms before in x10 mini pro and I am aware that inserting a battery percentage inside the stock battery icon will be very hard due to small screen size...
This would be a good feature as xperia mini and mini pro's battery is not very good...
So battery percentage will definitely help us to monitor our usage more accurately..

Thanks.
Loud speaker is not at all loud even with XLOUD.. If it's not a hardware limitation (speaker), SE to try to enhance the volume even more when XLOUD is on.
Is not loud enough? I find mine quite good actually, and XLOUD just makes it better... The louder of all the phones I´ve had.
when compared to other xperias (Neo V, Arc etc) difference between normal output and output with XLOUD is not much in mini pro.. I don't use loudspeaker much, so it doesn't really matter to me.. But if the volume can be further enhanced, why not 