My little sister throwing a baby shower for me and is setting up a website for it right now, and she's asking me for my input. She's only 17, so she's not really sure of the etiquette involved.

I'm questioning this one part here -

"Her baby is due around March 19, 2013 and Arden and her husband have decided to keep the gender a surprise.
They have also made the decision to cloth diaper their baby, so they won't be needing any disposable diapers or wipes!
In general they have carefully created their registries with a gender neutral, natural, and organic style, and also with their upcoming international move in mind.
They have several registries with plenty of items to choose from, so please keep this in mind if you choose to send them a baby shower gift. Thank you for thinking of them!" (registries are all linked below this)

I appreciate the effort to get people to stick to the registry, but does this come across as rude?

If I ask her to change it, I need to give her a replacement phrasing, so any help with that would be appreciated.