The latest X10 Mini Pro firmware news and releases from the XDA forums are as follows:
Flame.E v0.4[beta] CM 126.96.36.199 – this brings in elements of a number of releases but seems mainly based on GinTonic.SE. According to the XDA discussion development is on hold.
Re-Birth Of ArcMini V8 – ArcMini returns! A SE styled release based on GingerDX
If you’re not up to date, or starting out from scratch here’s the best place to get your device rooted and a recovery installed:
ClockWorkMod Installer – Windows v4, Linux v4 – for Windows users it’s all self contained in the zip file, Linux users need to root first; there are links to the Linux Rooter in the thread.
If you’ve tested or use any of the firmware listed please give feedback to other users via the comments.