Not much here in the way of local textiles as in other regions of Guatemala, but there are some local specialties worth noting; this region grows and dries massive loofas they can be found drying hanging from most any surface in early November. There is also a profusion of coconuts here, so plentiful in fact that they sit in big piles at the base of trees scattered all over town, and local merchants gather them and put them in big coolers. For 2Q you can have a freshly opened coconut with cool natural coconut milk inside, and then you can pour other drinks into it or smash it open and eat the coconut meat, which is delicious.
money
You may want to bring all the cash you need for your stay. There is a new bank as of Nov. '08 where you can cash traveler's checks, get credit card cash advances and other banking needs like change. There is one ATM in Monterrico in the local convenience store and when it runs out of cash or is shut down it can be days before it's in service again. Some of the more expensive hotels have been known to exchange American Express travelers checks e.g. Johnnys Place, but they will not give you the best of exchange rates. Similarly, a few hotels and restaurants accept VISA credit cards, though often with a 5% surcharge. Be warned VISA traveler's checks are not accepted anywhere in town.