I used to send samples to the e-mail adress for times and the samples still couldn't be detected a few days later...I don't know why...
So I hope there will be a website for us to upload(not a FTP space, I knew you have a ftp space for upload, to which you pay less attention)... I think it won't be a hard work for you guys and it's very helpful.
I hope the webside for upload may allow us to upload with or without zip. If it should be zip, no need to with password may be more convenience.
I think F-Secure have a good one: http://www.f-secure.com/samples But I hope it has less options than this one.
I hope too, personally I like website of Avira http://analysis.avira.com/samples/, you can upload not only suspicious files , also FP-s.
I hope next generation of Avast! will have ability send malwares to Alwil directly from the chest(without POP3), it will really big impovement!