If you use (or intend to use) iWeb to create a website, you can send a Numbers spreadsheet directly to your iWeb blog or podcast. The spreadsheet becomes an attachment that your website visitors can download.
Make sure you have iWeb ’08 or later installed.
Open your Numbers spreadsheet, and then choose Share > “Send to iWeb” and then choose Numbers or PDF from the submenu.
If iWeb wasn't open, it opens, and you can choose a new or existing blog or podcast to attach your spreadsheet to. If you have only one blog or podcast, the spreadsheet is attached to it.
When you publish your website, visitors who subscribe to your blog or podcast automatically get the latest attachments sent to their iTunes library (PDF publish only).
For more information about using iWeb to design and publish webpages, open iWeb and choose Help > iWeb Help.