1. I'd like to have the menu sit centered, a bit underneath the Blog name and description.
2. I'd like the drop down to hide the underlaying text when it drops. Right now it will hide the blog entries, but if drops down over the sidebars, the sidebar content is still visible.
Add the div code below around your existing menu.
[html]
<div style="text-align: center">
<ul id="nav">
<li><b>Zippy Kids</b>
<ul>
<li><a href="http://www.dewyapplebottom.squarespace.com/home">Home</a></li>
<li><a href="http://www.dewyapplebottom.squarespace.com/about">About</a></li>
<li><a href="http://www.dewyapplebottom.squarespace.com/contact">Contact</a></li>
</ul>
</li>
<li><b>Listings</b>
<ul>
<li><a href="http://www.dewyapplebottom.squarespace.com/products/">Products</a></li>
<li><a href="http://www.dewyapplebottom.squarespace.com/books/">Books</a></li>
<li><a href="http://www.dewyapplebottom.squarespace.com/activism/">Activism</a></li>
<li><a href="http://www.dewyapplebottom.squarespace.com/directory/">Directory</a></li>
<li><a href="http://www.dewyapplebottom.squarespace.com/news/">News</a></li>
</ul>
</li>
<li><b>Categories</b>
<ul>
<li><a href="http://www.dewyapplebottom.squarespace.com/add-adhd/">ADD/ADHD</a></li>
<li><a href="http://www.dewyapplebottom.squarespace.com/autism/">Autism</a></li>
<li><a href="http://www.dewyapplebottom.squarespace.com/spd/">SPD</a></li>
</ul>
</li>
<li><b>Discussions</b>
<ul>
<li><a href="http://www.dewyapplebottom.squarespace.com/addadhd-board/">ADD/ADHD Board</a></li>
<li><a href="http://www.dewyapplebottom.squarespace.com/autism-board/">Autism Board</a></li>
<li><a href="http://www.dewyapplebottom.squarespace.com/spd-board/">SPD Board</a></li>
</ul>
</li>
<li><b>Get Involved</b>
<ul>
<li><a href="http://www.dewyapplebottom.squarespace.com/suggest-a-listing">Suggest a Listing</a></li>
<li><a href="http://www.dewyapplebottom.squarespace.com/advertise">Advertise</a></li>
<li><a href="http://www.dewyapplebottom.squarespace.com/giveaways">Sign-up for Giveaways</a></li>
</ul>
</li>
</ul>
</div>
[/html]
For question 2 are you saying you want the background of the drop menu to be invisible? Clarify if you can't get it.
HTH,
Aric