After one week of learning Squeak/Pharo and NativeBoost I published the first (in development) version of my ICU wrapper based on my wrapper fro VASmalltalk. Its available at SqueakSource2.
It also needs the source code from the MSK-OS-Interface, which gives me a compatible OS layer in Pharo/NativeBoost and VASmalltalk.
The project is named ICU-V2 because during working on the project I noticed changes to the VA port and tried to isolate the platform differences. I will backport the structure to VA, when the Squeak stuff is finished. The main point in this project is: portability on both platforms.
Please notice, that there is also another ICU port available from Jan van de Sandt.