I'll be traveling to Portugal on buisness, where can I find a decent pocket translation guide?

Try Amazon.com or ebay. I have been to Portugal. A very lot of Portuguese people there, 45 years old or less, speak English. You shouldn't have much of a problem but it never hurts to learn some of there language.

If you want to buy it from Portugal then it should not be a problem to find one. You can buy it from a city stationery shop or a book shop. They call it Papelaria / Livraria.

In Uk i think you can find it at WH Smith.

In Portugal: in Fnac stores, El corte inglés (lisbon and Oporto), Media Market stores, Vobis stores, worten stores, good electronic stores, etc

In UK: in....hum......ehh........ i have no idea!

decent maybe not. just try to speak with younger people they will understand you