goinstall github.com/alloy-d/goauth

import (
    "github.com/alloy-d/goauth"
    "os"
)

func someFuncThatDoesStuffWithOAuth() (err os.Error) {
    o := new (oauth.OAuth)
    o.ConsumerKey = "key"
    o.ConsumerSecret = "secret"
    o.Callback = "callback"

    o.RequestTokenURL = "https://api.twitter.com/oauth/request_token"
    o.OwnerAuthURL = "https://api.twitter.com/oauth/authorize"
    o.AccessTokenURL = "https://api.twitter.com/oauth/access_token"

    err = o.GetRequestToken()
    if err != nil { return }

    url, err := o.AuthorizationURL()
    if err != nil { return }

    // somehow send user to url...

    var verifier string
    // somehow get verifier (or "PIN")...

    err = o.GetAccessToken(verifier)
    if err != nil { return }

    err = o.Save(os.Getenv("HOME") + "/.simple_example.oauth")

    response, err := o.Post(
        "https://api.twitter.com/1/statuses/update.json",
        map[string]string{"status": "Just did a little OAuth dance!"})
    if err != nil { return }

    // do stuff with response...

    return nil
}