I usually use dev-host as my primary link since up til now it hasn't blocked my links fro generating excessive traffic so I assume its bandwidth cap must be quite high
The upload speeds are quite fast also.
Mediafire is good, only problem is its stingy file size limit of 200MB. No bandwidth caps, just crappy file size limits and crappy upload speeds.
Dropbox has no file size limits, but a bandwidth limit of 20GB/day for the free account means that on a day where my account is *not* suspended, it will definitely get suspended for the next few days due to excessive traffic. And considering that I use dropbox as my mirror, it says something about how low the bandwidth limit really is