I've got a 3c575(CT) card which works quite well with 2.2.16 in an Inspiron 3800. I've been trying to "upgrade" the kernel to 2.4.0-test6 with little success. The problem appears to be that the i82365 module complains that: "Bridge register mapping failed: check cb_mem_base setting"
When running 2.2.16 the probe reveals : "TI 1225 rev 01 PCI-toCardbus at slot 00:03, mem 0x68000000" (followed by more info about each slot)
I've built my kernel with PNP, and without hotplug or PCMCIA.