In reply to BenPitt:
If you are looking for a nice intro to Tremadog but want to tick a two or three of the major classics fairly quickly, then start on Christmas Curry (do the normal version at Severe maybe which still has a fab top pitch) and then get on one of the easy VS's. One Step in the Clouds is a lovely open route and would have you buzzing I'm sure (the early v-groove is the crux for many). Because of its reputation and name (!), it became popular to knock the route but it is a gem. All the classics do get busy and you can find yourself queueing (if it looks too long a wait then go find another).
Practical tips:
Most people park at Eric's and pay the £1 and have coffee and food there. Great café.
There are two main crags within easy walking distance of Eric's - Craig Bwlch y Moch and Pant Ifan (the latter being further away). From Eric's you can see Pant Ifan across the road away on the left, Bwlch y Moch is just to the right across the road. It's about a 10-15 minute walk up to Pant Ifan -up the road and then across a large boulder field before going up through some woods.
If you are climbing at Bwlch y Moch, don't bother taking rucsacs. Walk there either with rock shoes on or take light trainers and carry them up for the walk off. There's no point leaving gear at the base of the route as it will be a bit of a pain to go back for it.
The walk offs are interesting but not hard and probably only slightly slower than abseiling off (which often takes you down through other parties climbing) - so by and large it is better to walk.
It can be hard to spot routes once you are in the trees. Try to spot your buttress/route from the road first.
Have a great time, my favourite place to climb.