Lots of my questions about the daughter card are answered by MikeJ & Yaqube over on EAB at this: http://eab.abime.net/showthread.php?p=744483#post744483 link.
Wow. Great questions you asked there Dave!

I love these little snippets:
Q: what clock speed was used for the 68060?
A: I have a rev 6 CPU and expect it to be running at 100 MHz or even over.
Q: What amount of RAM is planned on the expansion 060 card?
A: I have 128 MB of SDRAM. It will run with the same clock speed as the CPU does.
Q: the Micro-SD card for storage, like a hard drive?
A: Exactly. It's intended to be directly accessed as a Amiga hard drive. With the help of DMA the transfer rates will be much higher than with a hard file.
Q: Are the USB ports supported through Poseiden...?
A: We are going to use Poseidon.
This is going to be one hell of an Amiga. All we need is a fast 16 bit or 32 bit RTG mode to use for Workbench and Workbench friendly apps (such as IBrowse, Final Writer, etc) and it will be perfect.