LiFePO4 batteries are starting to be used in motorcycles. I have a Shorai branded one in one of my bikes. Compared to a conventional lead-acid battery, it is smaller and much lighter. It also has a very limited self-discharge rate which means I don't have to charge the battery when the bike is stored during winter. I do disconnect and bring inside the battery due to the cold weather and parasitic draws.
The downsides that I knew about are that they don't work as well in colder weather and they're not compatible with all battery chargers. Battery chargers with a de-sulphate mode cannot be used.
I wonder what the impact of this discovery is on motorcycle uses. The battery is really only discharged when the starter is engaged. The rest of the time, the alternator is keeping the battery charged and whatever parasitic draws when the bike is parked is minimal.
The PCI-SIG release is here. The electromechanical specification is also due to be released shortly:The new released doubles the signalling rate from 2.5Gbps to 5Gbps. The upshot: a x16 connector can transfer data at up to around 16GBps.
"The companion PCI Express Card Electromechanical 2.0 specification is currently at revision 0.9, having completed its 60-day member review. The PCI-SIG anticipates that this specification too will be released in the near future.