I’d say yes… there are the CSS properties ‘last-child’ and ‘nth-child’, but browser support is spotty at best for them… though I would suggest using the class “last” to say WHAT it is, instead of “right” saying “how it’s going to appear” – since it’s possible it might not be displayed “right” in all your different media targets (like print… handheld, media queries for device capabilities) – you are using the MEDIA attribute on your LINK to the css, right?
Remember, HTML is for saying what things ARE, not what they look like.