I really recommend OUP webinars – interesting, free, supported by additional downloads (ppts, pdfs etc), international audience, lots of sharing. The session is always recorded and emailed to all participants. I did “Teaching presentation skills” last month and it was great, lots of “nihil novi” but also lots of very fresh ideas. This month – Business English, maybe you will be interested. Tuesday, 12th February 2013 at 9:30-10:30 (GMT) and 14:30-15:30 (GMT). The only thing you need is headphones.
The registration form and more info below.