My employer is nearly the best! (I've heard there may be a couple of others in town who manage even better!!)
We get:

a commute bonus - I work 2 days per week and get a bit over $40/ month for commuting by bike - if I was full time it would be more like $80

covered, card key secured bike parking

lockers, showers, towel service

you can sign up to get a free bike if you agree to commute with it at least 2 days per week (you have to be at least half time to take advantage of this)

there are classes for new commuters on riding and basic maintenance and free lectures for everyone

everyone gets a free bus pass

5 taxi rides/year for emergencies

discounted bike maintenance by a mobile service who comes to the campus several times per year

And they are working on making it even better.... we had a bike commuter focus group just last week. We'll see which suggestions that they put into action.