The H3C hardware looks pretty cool so far, but can it do Netflow?

In short, yes. Netflow was designed by Cisco, however many vendors support something similar, for instance Juniper uses Jflow, Foundry uses Sflow, and H3C/3com use something called NetStream.

NetStream supports version 5,8 and 9, which maps to NetFlow version 5,8 and 9 for the most part. While there are some differences in the H3C implementation, Plixer has overcome these inconsistencies and now supports NetStream in their awesome product Scrutinizer.

H3C also offers a monitoring module for the 7500E and 9500E switches, if you wanted to perform NetStream collection directly on the switch.