Try these:
http://www.dripworks.com/categ...
I use them in the pots but should work with in-ground plants and should cover a large area. Watch out for smaller seedlings they will get flooded. I tested a bed one year and it did flood the seedlings and tore them up. Way too much water at one time for tiny seedlings.
I like the drip hose but the price seems high to me:
http://www.dripworks.com/categ...
I tried this in the 'Pot Ranch', it is not as flexible as the soaker hose. It shoud work and I think I would use this for larger in-ground beds. I too would worry about clogging. We have liquid rock water here in FL where I live.
1/4" soaker hoses would still be my choice number one, you just have to limit yourself to about 30' of run. It is more dynamic than emitters. Heck at $7 per 50' I will replace every couple of years when they clog.
