UNC Linux Users Group

[Tom Roche <Tom_Roche AT unc.edu>]

hoping a home-use question isn't OT:
Any suggestions regarding IP-use measurement apps for a linux desktop?
Why I ask:

I've been hoping to get ISP != TWC/RR for awhile, but haven't seen anything 
appealing. But I recently heard freedompop.com

http://en.wikipedia.org/wiki/FreedomPop

is now available in Carrboro and ISTM interesting pricewise and speedwise. 
(Which means I should probably post separately about that.) However the plans 
I find most interesting (currently) provide 10 GB/mo, with "Extra data 0.7¢ 
per MB" so ya definitely wanna stay under that cap :-(

10 GB/mo *sounds* doable for me, since my main access modes do not currently 
include streaming video. That being said, I really don't *know* my cumulative 
monthly bandwidth--only that TWC/RR clamps my downloads @ 1.92 MB/s (so I 
could not *possibly* be using more than ~5000 GB/mo :-) I'm wondering,

1. What could I install on my debian/GNOME laptop to measure my IP usage?
   Any recommendations by "actual users"?

2. Is there some TWC/RR UI that shows a user's IP usage?

TIA, Tom Roche <Tom_Roche AT pobox.com>