LEarning multiple languages at the same time??!

Greetings,

[Some background info, you can skip to the questions at the end if you
want. Also, apologies for the crosspost, but I feel that it is
actually an interesting and relevant discussion to all groups.]

Do most of you speak a lot of languages? How many? Why and how? Here
is my current situation, I wonder what you guys think:

So, I grew up in France. I was in France from 2-9, but I went to an
American school. Still I was exposed to a lot of French. Never ever
really got fluent, but I have the accent and pronounciation in me.

Picked up French for two years in High School during my Freshmen and
Sophomore years. Then didn't do a language again until the past year
and a half I took French up to the intermediate level in college. I am
now a 23 year old college graduate.

I can speak enough French to make sense now, and enough that if I was
in France, I could get around without having to speak English (even
though I'd butcher the French.)

Anyway, a couple of months ago, I decided to add Italian. Why Italian?
Well, it's a romance language too. Plus my favorite soccer team and
player outside of England is AS Roma in Italy. I'm picking it up
pretty fast, I'm concentrating more on grammar and tenses. It's pretty
much French with a different dictionary! So I'm picking it up at a
faster rate than I did French (especially as at I'm at a more advanced
level of french where at some point, it's more vocabulary and abstract
grammar i.e. subjunctive and complex tenses). I can introduce myself
and talk briefly about myself and others in Italian.

I study them both, I make up my own syllabi and follow them. For
French, I sometimes go to bed listening to French radio, and I do some
reading out loud. For Italian, I read out sentences, but I don't feel
that I'm comfortable enough to go into audio yet.

Now my questions:-
1) Where can I find/download Italian movies with English subtitles?

2) I'm greedy. I want to learn another language. I'm torn. Is it a bad
idea to start learning a THIRD language while I'm at staggered levels
of French and Italian? It won't mess me up will it?

3) Three languages. I don't know which to choose. I'm debating between
Spanish, Russian and German. Each have their advantages and
disadvantages.

I have a few Latin friends, as a soccer fan it'd be great to read the
Spanish media like La Marca?

German will be a departure from the comfortable "romance language"
thing I've got going. I'm also into history, and philosophy, and there
is probably a lot of German literature on that> I just admire German
civilization throughout history.

Then there is Russian for the challenge. Non-Roman alphabet.

Is there anything you can tell me about the disadvantages and
dissadvantages of the aforementioned three languages?

The main thing is that I want to be better at what I'm doing, and I'm
finding it really rewarding when I see or hear the odd phrases in
movies or print, and I recognize them because of my studies!

For those of you that speak more than one languages, I'd be curious to know which ones and how you came to learn them.