New Opera will come up with integrated web server so you can host
your blog or stuff on personal computer for free.
Off course you will need fast connection my upload is 64k so
everything will be very slow .

More info here:
Opera Unite

Example index.html on my pc:
Default Index Page

Example image gallery:
Photo Sharing | Opera Unite service

After turning on your Opera your web server is automaticly up.
Also new opera pass acid3, it is faster then ever, according to the new test its faster then Firefox 3.5 beta...

Check Opera thread for more details.

p.s.
Its still under early beta