Grabbed it and updated. Some improvements, but definitely still not validator friendly.
Looking at the generated source, the del.icio.us tag looks fine:
<a href="http://del.icio.us/post?url=http://www.solo-technology.com/blog/2006/02/23/google-page-creator/&title=Google+Page+Creator" title="delicious:Google Page Creator"><img src="/blog/wp-content/plugins/blogbling/images/delicious.png" class="notable_bookmark" alt=":Google Page Creator" /></a>
The & is a in there as & and the validator doesn't seem to have issues.
However, it just pitches a fit about the spurl tag:
<a href="http://www.spurl.net/spurl.php?title=Google Page Creator&url=http://www.solo-technology.com/blog/2006/02/23/google-page-creator/" title="spurl:Google Page Creator"><img src="/blog/wp-content/plugins/blogbling/images/spurl.png" class="notable_bookmark" alt=":Google Page Creator" /></a>
I wonder if that & between Creator and url should be & instead?
Here's a shortcut to validate one page.
http://validator.w3.org/check?uri=http%3A%2F%2Fwww.solo-technology.com%2Fblog%2F2006%2F02%2F23%2Fgoogle-page-creator%2F
I'm probably being anal about validation... but I was publically raked over the coals a month or so ago about it and now I'm perhaps "hyper aware"!
And don't get me wrong -- I LOVE the plug-in and hope we can sort some of this out. If you'd prefer to take this to email or IM, just holler. handy.solo@gmail.com