The latest x10 mini firmware news and releases from the XDA forums are as follows:
MiniCM7-2.1.3 – the latest release of MiniCM7, this is the unofficial CyanogenMod release for ‘true CyanogenMod7 Experience’
With all the interest in getting the official CM7.1 installed on the Mini there’s a new thread CyanogenMod 7 for the Xperia X10 Mini where this is being discussed, also check out the FreeXperia discussion thread.
It looks like E10 SonyBread – Seven SP3f has been discontinued for the Mini by dev Paul-xxx.
If you’ve tested or use the firmware listed please give feedback to other users via the comments.