If you make a lot of PC to phone calls using Skype but haven't already signed up for a 12 month unlimited plan, you might want to think about placing an order before May 6th. Because Skype is offering a 25% discount for customers who sign up for unlimited SkypeOut plan between now and then.

The cheapest plan starts at $2.95/month before the discount is applied for calls to landlines and celllphones in the US and Canada. You can also subscribe to a plan that lets you make unlimited calls to landlines in a single country, or an "Unlimited World" plan that lets you make calls to landlines in more than 40 countries for $12.95/month before the discount is applied.

[via GigaOm]