Found this paper by reading Fofonoff's "A highly flexible manufacutring technique for microelectrode array fabrication" and then proceeding to download the paper from STINET. The paper concerns the TEAS project: the telemetric electrode array system project from 2001. The wireless transmission method was going to be BlueTooth with a supposed data transmission rate of 700 kilobytes/sec. 

- "Bursts of spikes can be captured by an onboard 2MB buffer, which can hold up to 20k spikes, or one second of 300 Hz activity on all 64 channels. The information in the buffer can be transmitted in 25 seconds over the wireless link." The chip also supports real-time transmission of timestamp values of triggered neurospikes.