Dear expatriator,
I was actually just in Triana, in Seville, for a few months in 2008. I was studying at the university for one semester you see…. Anyways, I was renting an apartment just off Av. de la Repulica Argentina, in a really nice apartment which was perfect. It took quite a while to find tho, but before I went (about 6 weeks before) I checked out http://www.holistay.com/spain/ which was really good (I actually ended up renting a apartment off this site for about 500 / month). Id recommend this site.
Apart from this site I used the official Seville tourism site http://www.turismo.sevilla.org/paginas_en/portada.asp to get a better idea of what the city has on offer. Finally, use http://www.weather-meteo.com/forecast-in-C.asp?U=eur|ES|SP001&C=SEVILLA&S=Spain I found it had the most accurate forecasts for the city.
If you have anymore questions please do ask!
Best of luck mate x