Diacritic characters in permalinks

Here’s a minor problem I’ve encountered: when using the ‘%postname%’ “tag” in the permalinks options, if you have diacritic characters in your titles (you know, accents, ç and stuff like that) they get “converted” all right, but those diacritic characters are left out.
So, if you have a title saying ‘Regardez ?a!’ (or ‘Regardez ça!’ in case this board munges those characters), it will be “converted” to ‘regardez-a’.
Of course, you could choose words in your titles that avoid those characters (although in French this could be quite tricky), or ignore the problem altogether. But I wondered if this could not be fixed in a future release? After all, that other blogging tool (MT) converts those characters without problems.
I am not a programmer, so I do not know if this is feasible, but it could be a matter of including rules like:
é -> e
à -> a
è -> e
ü – u
? – c
etc. I’m sure you got it by now.
Any ideas (or reactions) regarding this?