Canadian decor maven Cobi Ladner has a great blog, and just posted a super round-up of great, modern ideas for festive pine cone decor. Pine cones are an obvious and economical way to decorate, and I love the idea of hanging them from festive ribbon as above and below instead of a wreath! You could do it on colourful ribbons and add a few brightly-coloured christmas balls - or do it on natural linen ribbon and add some twigs and rustic linen decorations (a la pi'lo) for a softer look.
Sarah also did a lovely grouping of pine cones in her modern holiday decorating
(love how she used the ornaments too):
And here are a few more ideas I found that I like:
Love this one - so Swedish...here
Um...it's happening guys...I'm getting in the Christmas mood! Look out!