The problem is finding CF cards which support the ATA standard. The most common place to find information about which cards are suitable is the iPod world, because lots of people replace failed microdrives with CF cards. Any CF card which will work in an iPod will work in an IDE-CF adapter, with the only exception being that certain adapters don't support CF cards larger than 2 gigabytes.

I use various IDE-CF adapters as boot drives for installing MacOS and NetBSD on m68k Macs (actually, SCSI-IDE-CF), and I have booted a Q630 via an IDE-CF, so it's certainly doable.