I bought a Hotway 55-in-1 card reader.
Supposed to be able to go up to 20MB/s for SDHC and 28MB/sec for CF UDMA.
So far may Transcend Class 4 can do nearly 16MB/sec on this reader.
Sandisk Ultra and Kingston 266x CF can do around 25MB/sec.
So it is quite close to the stated specs.
Below $20 at SLS.
For faster readers, you need USB3 or firewire I think.