I routinely see 8-10 Mb on Clear's WiMAX...at least here. But looking at the Clear forums, lots of people complain about flakey speeds. And it's unlimited use, no caps or throttling for $50/mo...at least until they go bankrupt.
I use it to Slingbox at the gym and it works great. No worries about any caps and it's snappy enough to stream near HD quality.