You can use ‘Paste Special’ to get this done if you’d like- just copy from Excel and use Crl+Shift+V (or edit>Paste Special) and choose ‘keep formatting’. Our default html handling currently strips tables since pasting from web pages so often includes tables for layout.
Why didn’t I think of that?! When you hit Ctrl-Shift-V, you get the following dialogue box.
Choose "Keep Formatting", and VOILA! You have a nice table in your blog post.