This question comes out a previous thread and is with regards to hosting a meme ie WBW, IMBB, SHF, Paper Chef, Dining Out, etc.
There are two ways a host will generally ask you to submit entries - either via email or in the comments section. (I personally prefer email method)
I recently hosted WBW and although I didn't, on the whole, reply to any of the emails, I did endeavour to post a comment on all of the participating sites (except those requiring registration).
Q1 Do you expect a personal email reply when you mail in your entry to one of these events?
[I have never expected a reply, assuming the host is too busy]
Q2 Do you expect a personal comment from the hoster on your entry?
[I really like it when the hoster makes a small effort to acknowledge my post and let me know they have actually read my entry]
In the future I might decide to respond to evey email with a non-personal reply of reassurance:
ie - thank you for your entry which I can confirm I have received. I expect several hundred particpants this time so please be patient while I take the time to visit every site, read every post and put together a round up. It might take quite a few days. Thank you. As well as and in addition to leaving a personalised comment on the post itself