My question concerns the simple fact that I am going to be stooting a movie using Canon HV20 camera, now if the camera can only playback my footage at 1080i throw the HDMI cable will I be able to get 1080p just by scanning it as 1080p?

No.

You need to remove the 3:2 pulldown. Either you:
A- Manually spot the pulldown cadence and remove it. There's 5 possible cadences... you just guess and check.
B- One of the cineform products can remove it on the fly.

About a 1080i to 1080p scan as I mentioned before. What if I was using one of these on the camera in 4:3 Mode?

Go to:
http://www.bhphotovideo.com/bnh/controller/home?shs=animorphic+converter&ci=0&sb=ps&pn=1&sq=desc&InitialSearch=yes&O=RootPage.jsp&A=search&Q=*&bhs=t

Robert,

Could you provide a little more information on what you are really trying to do?

When you say movie, do you really mean that you want to convert between video and film?

If so, as Glenn pointed out, there's more involved than interlaced vs progressive, there's also the issue of frame rates of video vs film

Anamorphic lenses (and adapters like you've referenced) only change the ratio of height and width in the image.

Apologies if I misunderstand your objective, but 4:3 refers to the ratio of image width to height and has nothing to do with 3:2 pulldown which refers to how to match film frame rates to video field rates.

http://www.dvdfile.com/news/special_report/production_a_z/3_2_pulldown.htm

I just found what I need. This thing will upscale 1080i to 1080p from any source.

It's called the VIP 2000.

Go to:
http://catalogs.infocommiq.com/AVCAT/images/documents/pdfs/VIP%202000.pdf