There are now two paradise blankets located near the community sandbox on the Second Life English (Virtlantis) SIM. A big thanks to Eyebeams Electricteeth for making me aware of this interesting holodeck tool. Both blankets are now configured for public use. Simply have a seat, click "Use it!", select a holodeck scene, and choose your desired altitude (anything other than 300 and 600 is currently recommended due to the presence of other objects in the sky). Enjoy! :)