I can't recall the last time flash limited something I wanted to do on the iPad that apps like skyfire could have fixed.
Would be nice not to have to pay for hulu plus or justin.tv's $10 app which isn't very good anyway, but yeah those wouldn't be helped by the flash apps anyway.
If you've got a specific website you are trying to view thats compatible then yeah sure, but I wouldn't bother with it if you just think you need to in general.