I have had the Kingston Elite Pro 512 MB memory card ever since I got my Nikon Coolpix digital camera. This memory card came with the package. The memory space is not that much, as it only has 512 MB, but it is enough for my purposes. A day's travel and it can save me up to 130 high res images from my 6 megapixel camera.
Once I plug my camera to computer, I am able to download my really big pictures in a jiffy because this card is easily readable.
And most of all, I think it is very durabl. I have been using the exact same card for more two years now and it still is working very well.
When bought at the store, I think it costs only around $10. But since I got it for free, I didn't really bother upgrading as this one works just fine for me.