Eyelock claims it's spoof-proof magic is that it scans both irises. Not only are the irises logged, but the relative spacing between the two is part of the ID. It's hard to spoof the shape of someone's head as well as the shape of the iris.
As far as a physical security offering, they do exist:
Pricing for either of those is far more than $300, more like $20k - $50k for starters. A big 'limitation' of Myris is that it is works for five users only. With such a small number of potential matches, of course it is fast and accurate! It is more difficult to create an access control product that quickly compares hundreds of potential valid users: not only does scanning the database take longer, but more care/precision must be taken when scanning irises. The confidence coefficient really must be ramped up.
It also bears mentioning that Access Control typically takes place outside in the elements, not in a serene, environmentally controlled office. Simple things like the position of the sun, dirt film, and whether or not the user is wearing sunglasses are big things to an iris scanner.
It's interesting to see the Eyelock get buzz, but the technology is really not new for access. Manufacturers are still trying to find how to implement it where it is a big improvement over current credential / biometric methods. For that, iris scanning still has a long way to go.
I guess what I meant by "eye-logger", (unrelated to matthew 7:5), was something that would sit right after the sensor and pass thru the data as well as record it kinda like a key logger does. I remember seeing some futurama type flick that had a two way iris scan, where the thing shot your eye with an ultra low power laser at random intervals to make sure it was a live feed.
Also, the thing is not as you might think, liberating, because you gotta take it with you everywhere you go, just like your access card but a whole lot bulkier and with a cable dangling. I'll wait for the google glass integration first.