It seems that there is no way to mount shares whose names
contain characters that need to be quoted by the shell.

smbmount "//smbserver/sharename with funny chars(likethis)"
mountpoint

you get an error from the shell pointing out that it doesn't
like the invalid characters when it passes the arguments to
smbmnt.  Double escaping those characters also doesn't work,
as smbmount give you an error if you use something like
smbmount "//server/share\ name".