With the PlayStation Eye now out (as part of Eye of Judgment) SCEE have added the first few downloadable titles to the European store, sadly the initial batch of games wasn't quite as good as we might have hoped for. TheSixthAxis.com has brief reviews for each of the titles.
If you ask me (which I'm sure most of you wouldn't!), I'd say you get exactly what you pay for with these games. What do you expect for those prices?