Announced in April, SlingPlayer Mobile for Symbian UIQ is now ready for beta testers. Symbian UIQ is distinct from Symbian S60 (aka Series60), an update for which was released recently. While Symbian S60 is used on phones from Nokia, Symbian UIQ is used by vendors such as Sony Ericsson and Motorola.
If you’re a Slingbox owner with a Symbian UIQ smartphone, you can apply for the beta here.
Disclaimer: I’m not only currently employed by Sling Media, I’m the Program Manager for the Symbian UIQ beta.