[chef] repo's usually don't have latest version

[S Ahmed < >]

Since repo's don't have the latest (stable) version of many applications, is there an example of a chef cookbook that downloads the latest version and then sets up the startup scripts etc?

I'm specifically looking for redis and/or mongo but it doesn't really matter as I imagine the general pattern would be the same.

i.e. any example will do

(I will be running Ubuntu)