This is an additional post.
My problem with the Belkin Pre-N router continues. The wireless functionality now completely collapses after one day or two. Had a chat with the Belkin tech support who was clueless and who could only recommend some basic changes to the setting. The phenomenon is now accentuated. Performances on the wireless system very quickly decreases till unworkable. Router resetting is working...which is a tiny consolation. A similar problem was also reported in an article by David Haskin, published on 12/29/04 in SmallBizPipeline.
So I did my last changes to the wireless setting - most of the options OFF and 811G only. Stay tuned !
When will Belkin fix this problem? Have not seen any Firmware update yet !