The site has still has prices in Lats (LVL), pages are not updated since long long time ago, but in any case it stays as it is as a nice souvenir to old times.
Update October 2'nd 2013:
Unfortunately Meta Kafe was closed!
Trying to locate interesting places in Riga got me to this place, "Meta Kafe" is not a spelling mistake, it is the name of the place.
Every dish in the menu has a story behind it, the ingrediants from which the food is made of are natural and carefully selected.
Prices are in the mid range, I took the Lamb soup (very much recommended).
Note: Meta Kafe is moving to a new location, so for now it is closed.