The next revision of IBM Cell Broadband Engine machines has just been released - the QS22 blade. The QS22 has five-times the double-precision floating point performance of the previous Cell blade (the QS21), but is instruction-set compatible. This is also the first Cell/B.E. machine to use DDR2 memory, and can hold up to 32GB.
In other powerpc news, Terra Soft Solutions have announced the PowerStation - a deskside development machine, based on 2 dual-core PowerPC 970MP CPUs. It comes with Yellow Dog Linux installed, including the Cell/B.E. SDK. Hugh (amongst many others) has been doing a lot of great work getting this machine out the door (he has a number of posts on his blog if you're keen to see the "making of" feature). Nice work Hugh!