Handwritten Invitations:
Labels will always be tacky, but I disagree that invitations "must" be handwritten. Typewriting was considered tacky because this was for business correspondence - but today we have laser printers with beautiful fonts that mimic handwriting (Lucida Handwriting, Edwardian Script) and the engraving that was traditionally used for formal invitations.
What???? is so terrible about running the envelopes through the printer?
Shower Hosts:
Glad to see this go. I could care less who hosts, so long as it isn't the bride herself.
Multiple Showers:
I really don't care if a bride has more than two, so long as the same guests aren't invited to more than one (with the exception of the moms and the wedding party), and if everyone is invited to the wedding. Some brides have large weddings. Big deal if she has four showers.