nOOb question about connecting PS 3 / TV / Sound System

[fabi519]

Heya,
sorry for asking this question, I guess it has been asked already many times. I post it nevertheless in the hope to get a faster and more qualified answer (in confront to google it). Besides that I am pretty busy these days.

I apologies if it has been asked over 20 times before...

I finally got all my stuff together:

PS 3 40gb
Sony XBR4 52"
Onkyo 705

I have also a couple of hdmi cables (thanks to the tip of purchasing them at monorpice.com)

I hooked up the PS 3 with the TV with the hdmi cable.
I haven't hooked up the sound system yet, but will do it tomorrow (a friend is helping me because I have no clue about connecting sound system).

I thought that everything gets connected with everything with several hdmi cables.
But then I noticed that the PS 3 has only one hdmi port. Is that correct?

How do I connect the different systems with which cables?

If I conect the TV with the PS3 using the only hdmi port of the PS3, how I do I connect the PS3 then with the Onkyo system?

I guess I should also connect the Onkyo with the TV using an hdmi cable, is that right?