These are usually used as bypass capacitors for microprocessor crystals. The 22pF value works well with 8mhz - 20mhz crystals. I use them on BotBoards, 68HC12's, PIC's, etc. Note that these are COG rated, which are quite accurate compared to the Z5U style above. I would keep 10 of these on hand.
Switches are usually difficult to deal with.
If you are breadboarding, most switches won't fit the breadboard. Except, of course, for this one. Randy Carter, a long time member of the Seattle Robotics Society, turned me on to this switch. It even has leads that are long enough for a solderless board. I recommend 10 of these to anyone.