On the new blackberry bold 9000, when you catch a wifi connection, for example, at home: and you go on the application which you downloaded earlier from WIFI, windows messenger live, do you pay to go on it? Even if youre connected through wifi connection?

also, when not connected through wifi
i got this data plan where i can send about 1000 or 10000 pictures a month
and if i click on a photo it says
MSS photo
send picture to facebook
etc.
if i send it to facebook, does this connect through the internet?
EVEn if i downloaded the FB application earlier at home through wifi?
does it just go into the pictures a month if i upload mobile photos through my phone?


and one more question.
if im on windows live messenger NOT connected through wifi
(i have a data plan, 500 mb a month)
the only thing that changes on the chat screen is the very last line, when a new messages comes in.
does this take up a lot?