According to unwiredview.  The Sony Ericsson Xperia X10 Mini and X10 Mini Pro will be released in France and Belgium starting late May (the Mini) and June (the Mini Pro).

Sony Ericsson has confirmed the prices of the two new Android smartphones: the Xperia X10 Mini costs €300 ($410), while the Xperia X10 Mini will be sold for €330 ($450) - both prices are for the unlocked versions.

I have a personal opinion towards Sony Ericsson, why is the Xperia X10 keeps on getting delayed?  First we heard, it's going to be release in Jan 2010, the March, then April.   Is it just me or Sony Ericsson needs to work hard in this super compeitive market to be more successful? Well, you don't have to agree with me.  Like I said, this is my personal opinion.

Announced by Sony Ericsson, there will be a software updating coming very soon to your Xperia X10 phones.  When the updates get pushed. you will see a notification on your xperia x10 asking if you want to update.  The easiest way to get the new software is to accept this update - you can use your mobile network connection or a WiFi connection for the download. Alternatively you can update your phone using your PC - please visit www.sonyericsson.com/update and follow the instructions.

Here what's the update will do:

This update focuses on improving the general performance, speed and responsiveness of Xperia X10. For example, there are speed improvements in messaging tasks and camera UI. In addition we add a free back up and restore application so you'll never lose your settings and information. In selected markets, PlayNow with premium apps and games will also be added.

source: http://blogs.sonyericsson.com