I'm looking for one as well. It looks like the line from Saleae would be ideal for analyzing I2C, SPI, and old-school serial signals.
What I'd love to hear is how the $15 eBay clones compare? It looks like the software is free from Saleae, and I did watch one YouTube video where the guy was very happy with his clone. Though it's not clear with Saleae the eBay model is a clone of ;-)
I lean towards spending a little more money and buying the quality product from the folks who sell the real deal -- but the price difference is substantial. Is it possible that the $15 eBay version is just as useful as the "real" product from Saleae?
And if Saleae makes the most sense -- for the basic Arduino I2C/SPI/Serial analysis, which one will get the job done and not have me wishing I'd bought the next model up?
Also right now the Saleae website makes it look like all of their products are pre-order -- as if they have re-vamped their whole line?
Thanks in advance for your thoughts and advice.