That very question, specifically with regard to hme and qfe, but also some others, has come up lately. I'm of one mind (I think my position is clear by the very fact that I've invested effort here), but not everyone shares my opinion.
In order to have an on-line concrete resource I can point internal Sun naysayers at, I'm asking you to voice your thoughts here, by posting a follow up to this blog. (Sorry, no anonymous posts, but that means your posts will carry all that much more weight.)
Do you still use hme/qfe in systems? What about Sun Trunking with qfe? Would you upgrade to Nevada if there was GLDv3 support for these NICs? Would Nemo features in qfe/hme help you? Would a port of hme/qfe to x86 be useful to you?
Please post a follow up on my blog here, with your opinions!