I would select a 100pF rather, the in-depth reasoning behind it is that I have seen such on many LPT-connected boards... :-) But I am sure Kai or somebody else could come up with somemore appropriate terminating circuit - although the problem here is crosstalk rather than termination.
Oh the nice cable - molded ends can hide many nasty errors - e.g. mains cables with molded both ends are famous here to use the colors incorrectly...
There is a lot of issues with SPI ISP - and you can read a lot about it as SPI ISP is used also for the most popular mcu families (PIC, AVR). The maximum recommended length of cable to be trouble-free is about15cm... This is so because the smallest capacitive crosstalk can produce a significant spike on CLK, which is the only timing element of this "bus". Also, there is no dedicated SPI hardware on PC, so the implementers are left with abusing slightly the parallel or serial port, consequently struggling with the fact that PC was never intended to work real-time (timing issues); on laptops the port have reduced drive capability and sometimes use auto-shutdown; and so on.
In this respect, UART ISP is far superior to ISP SPI (although its not to say it does not have issues...)

Jan Waclawek