-isochronous endpoint I/O
+for 1.1 or future
+==================
optional timerfd support (runtime detection)
-API docs
notifications of hotplugged/unplugged devices
-thread safety
-signalfd emulation through pipes and sigaction() for older kernels
-signalfd not needed for usbfs? can we poll on the fd?
-use poll() rather than select()?
+offer API to create/destroy handle_events thread
+isochronous sync I/O?
+exposing of parent-child device relationships
+"usb primer" introduction docs
+more examples