remember there is one vcard per contact, so it kind of becomes PITA to import them.

you can use the following command to merge all vcard into one file

more *.vcf > ../all.vcf

and then open the all.vcf in notepad++ and replace END VCARDBEGIN VCARD with END VCARD\n\n BEGIN VCARD

as every thing is appended in one file, the next vcard does not got to new line after ending of previous vcard.

once the replace is done, you are all set to import all the vcard into google or outlook or evolution.