well i have been a good lil researching bunny...
1) The festival definately takes place over two weekends with what looks like no provisions during mid week -- therefore perfect opportunity for a summer holiday
2) i havent managed to find out if the festival has camping facilities, i would assume so however im not going to be using them, mainly because im not sure of how comfortable id be leaving 10days worth of stuff in a tent in a foreign country + cant really see myself learning Portugesse before the end of May therefore meaning nightimes could be a little boring
3) ive found return flights with BA, direct to Lisbon airport for £150 return from heathrow -- you can get cheaper flights however it means changing at Paris Charles de Gaulles, and i cant be arsed with all that fussing. Going down on May 28th, coming back June 7th.
4) Theres plenty of fair priced hotels in the region, staying in Lisbon is more expensive, theres just two of us going and its costing £720 for 10nights (split two ways, not each) -- you can get cheaper, im just going for something close by and its my main holiday this year so im allocating most of my funds for it.
5) The official website is:
http://rockinrio-lisboa.sapo.pt -- google does a reasonable translation, but nothing precise (i.e. "Rock in River"

)
6) Tickets are onsale March 1st -- however i dont know where to get them from, any help on that would be greatly appreciated,
Neil if you know anything id be really grateful if you could post it for us 7) Lineup so far, Guns n Roses, Sting, Metallica, Britney Spears

, Charlie Brown Jnr, Slipknot -- if the previous events are anything to go by it should have the best festival lineup this year, i've read that Paul McCartney is strongly rumoured as are ACDC & somebody mentioned theres a spare date on the RHCP tour for one of the nights, although this isnt something ive looked into myself
Im booking hotel and flights next week, and im getting mighty excited too!
Mike