I have busy working today vs I have been busy working today

Some examples from the web:

• I haven't really had time before now - been busy working - and it's 'Miss'.
• We are all very busy working on them, and I have also noticed that in the Netherlands, associations, for example, are reporting claims in connection with Poland, among others.
• I'm not working today. I have an audition for Entourage 2.
• I'm busy working on Harmony's case.
• You know, I was always too busy working.
• All the project geeks are busy working tonight.
• Unless she's too busy working.
• I was too busy working last night trying to keep warm.
• I was too busy working to pay attention.
• Well, just busy working on something.
• Tell them he's busy working.
• Well, we've been too busy working.
• She is very busy working on a story about the appropriation committee.
• I've been busy Working on our future.
• I've been pretty busy working with KP, so...
• The farmers are busy working in the fields.
• Sorry, I've just been so busy working on my bio dad file.
• We'd love to, but we're busy working a landmark age-discrimination suit.
• We were both busy working on cases when we got married, and we thought we'd always plan our real one.
• I know you're all very busy working hard -

Some examples from the web:

• This will not be easy, as is shown by the fact that in the last few months nearly all of our parliamentary committees have been busy working out which areas are likely to experience difficulties or conflicts of interest.
• I have been busy, trying to get patients.
• I have been busy for two days.
• You and I have been busy doing other things besides discussing the past.
• I have been busy, trying to get patients.
• Donovan and his friends have been busy.
• As Mr Wynn has indicated, a number of rapporteurs have been busy on the various parts of the budget and I have addressed the whole issue of the structural funds.
• I haven't really had time before now - been busy working - and it's 'Miss'.
• This is because a small number of NGOs have been busy trying to equate Zionism with racism, and, even worse, have distributed texts and writings, examples of which I have shown to Mr Michel, in which they patently extolled the merits of the Holocaust.
• It'd have been busy in the pier, Saturday night.
• Brick's men have been busy.
• Our gleaner friends have been busy.
• You must have been busy lately.
• ALESHA: FRKL have been busy.
• I travel a lot and have been busy.
• My, you have been busy.
• You must have been busy enough upstairs.
• Your mama must have been busy.
• We'll have been busy preparing for the trip.
• Since then, we have been busy carrying forward the preparations for Stage Three.