How can I textalign my excerpts so that they are justified left and right? It looks particularly odd on my frontpage, where my first post is full (and justified), but the following post excerpts are all leftaligned.

Could you supply a link to an example on your site?

Sure: husdal.com

Adding the following to ATO>Add HTML/CSS Inserts>CSS Inserts may do the trick but I would add that justified text is not considered to be the best for readability.

div.post-bodycopy p {
text-align: justify;
}

Thanks!

As to readability, I find personally find unaligned texts much harder to read, but that's just me.