I was reading in bink.nu that there is some ways actually talk with Internet Explorer team and yes… rumor says that there is that kind of team.
Try these out:
1) Does Microsoft care about Webmasters? (IE group program manager Tony Chor is answering questions there — read all three pages).
2) When will we see features that Internet Explorer lacks? (Tony Chor is answering questions here too — read all three pages).
3) Wiki for leaving product feature requests for IE (the IE team is watching here).