As of right now, our first location is up and running successfully. There are a few minor idiosyncrasies we are ironing out, but KIP is making it through day one just fine.
We are using an Intel Mac mini server with two Intel iMac clients and one G5 iMac client. The Intel iMacs are lightning fast (think Emeril - BAM!) and the G5 seems to be hanging in there just fine, but noticeably slower.
We will give it a few weeks, just to make sure - but this transition went extremely well.
It seems this version takes full advantage of the Intel processor, so keep that in mind when you consider any hardware purchase or upgrade.