Awesome news for people who have this phone. Today russian android users forum have posted a link to .kdz containing Android 2.1 for LG GT 540. Users already flashed theyre handsets with new version of android, and are wery happy with it. 

People had to wait since the announcement was made in july, it got leaked today. LG is planning to release official update in few weeks.

Instructions how to install the update are here.