My company will match up to $1,000/year. I forget exactly how they do it, but I think that they'll match 50% of what you contribute up to 3% until you max out.
So...
if you contribute 1% - they do .5% up to $1k
if you contribute 6% - they do 3% up to $1k
if you contribute 10% - they do 3% up to $1k
etc.
I think.