O2 Mobile Broadband, Will this use more memory?

[Connarhea]

I am going to buy a dongle to get O2 (NYSE: TEF) Mobile Broadband and have a three part question because of it.
I was wondering if
1 using msn or anything like it (ie Digsby) would run through my allowance (3GB) really wuickly because it has to constantlly updating your conversations.

2 Would a site like facebook (or twitter etc) use up the memory quickly because they have live feeds through the homepage and notifications

3 Would uploading pictures or files count towards alloted memory usage?

Thanks in advance for any help you can give

[bmx.bandit]

MSN etc are fairly low bandwidth applications, so wouldn't use much of your allowance. The same goes for Twitter.

However, browsing the Facebook website will use more bandwidth because it has a lot of pictures - especially if you're browsing through your friends' photo galleries.

Uploading images will also use up your allocation.