For most Arduino use, though, I'd agree that 100MSPS isn't too shabby since themax frequency output square wave from a timer is 8MHz (12.5 samples per cycle)
Logic analyzer is better, especially one that can act as a protocol analyzer also, such as determining what SPI transfers are taking place and for measuring lenghts of software loops. This one does that wonderfully with 16 MHz Arduinos:http://www.saleae.com/logic
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16