The app is now on the market! either search for "xperia play camera" or you use this link https://market.android.com/details?i...=search_result.
The instructions are now obsolete but im keeping them there for completeness.
1. Backup the original camera application with a root application manager e.g. titanium backup
2. Then delete the original camera app
3. Reboot your phone
4. Install the .apk from below
If you have a previous version installed you do not need to delete the old one or reboot just install as you would any other app
v5 - fixed remaining issues this is the final version as of time of writing please report any issues.
v4 - fixed video mode and added non root version
v3 - pictures now taken on release of R1 and menu position fixed
v2 - Decreased menu size by about 40% and fixed minor graphical glitches with menus
v1 - Original release, has VERY large menus
Hope you guys like it!