meaning - What does やい mean?

Someone ended their sentence with やいな. What dialect is this? What does やい mean? I assume that な means the same thing as in standard Japanese?

Update: the original sentence was 「もう出来あがり？仕事はやいな～」.

Answer

Update: This is not an instance of やい, but rather 速い【はやい】, so the information in my original answer is not actually applicable in this case.

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Wikipedia suggests that at the very least, this is a feature of Hakata dialect (though it is also likely a feature of other dialects as well, as suggested by my comment above). In Hakata dialect, it is used as a light suggestion/command, like the ～て form of verbs in other dialect:

• 「やい」(軽い命令)
  動詞の連用形に接続。「やれ」の転化したもの。
  例
  
  
  
  • 「ちょっとあそこを見て」→「ちいとあすこば見やい」
  
  
  
  

な would then be the same as in standard Japanese, as you assumed.