Multiget support in memcache/memc nginx modules

Hi,

It looks like neither the nginx memc module, nor the memcache standard
module supports multi-get out of the box. Is there an implementation
openly available, that supports the same?
How about support for larger keys? (If implementation is based on text
protocol, key-length seems limited to 250 chars vs 65K in binary
protocol)

Thanks,
Ashish