I hate the pigloos too, and what's funny is not a single one of my pigs will even go in one...I dunno why...but I can plop a giant pigloo in their cage and nary a single poo will ever show up in it...even if I put their veggies in it! Hehe..maybe they don't like to look at the world through a purple haze.
Personally, every single one my pigs will choose their "Grassy Hutch" (distributed by "Super Pet") waaaay over any of the wooden houses I've bought...and I have more than a few of those. They lOove their little hidey hutches, mainly because it has 2 doors I think..maybe they never feel trapped in it. It's edible of course, and I think it might be more cozy or something. I like them because they aren't to big, and I can get a couple of them in a 2x4 cage.
I do have to have a Grass Hutch for each pig though, or they will constantly be swiping it from each other since the Large one will only accommodate a single full grown pig. A couple things to remember when searching for one. First you want the "Large" one. The small one is rat sized and piggies won't fit. The other thing is not to confuse this one with the "roll-a-nest" ones that have bottoms on them. Guinea pigs poo/pee where they sit the most and personally I don't like to give them anything permanent that's gonna get wet and soggy.. The cardboard "chubes" are fun but ...they gotta get tossed every so often cause they do get funky.
I've been fighting with a local pet store chain in my area that doesn't seem to get it. They only carry stuff that is A. too small, and B. has bottoms. I keep telling them they are missing out on several hundred dollars a year from me by not carrying good guinea pig stuff. They keep insisting they do, and
Oh well...here's a link to show you what they look like and a lot of places to order online.
Grassy Hutch - Google Product Search
Pretty much any local feed store or pet supply store
(don't support any that sell animals) will gladly order one for you if they don't have it on hand.
Wood hidey houses come in several styles and most pet stores carry at least one style. Choosing the size is important since many of them are made for rats and they can easily outgrow them once the pigs are full grown.
Pretty much any LOCAL pet supply store will order them for you, since Super Pet is a MAJOR supplier of almost all of them.
The wooden houses are also distributed by Super Pet as well. They call them "Woodland Get Aways" and my only pig who actually hangs out in them I have (they outgrew the smaller one I had for when they were little) is Lancelot. Lance is a huge guinea pig both long and wide.. and his big (mostly hair) belly gets stuck in the grassy hutches.
..poor guy..I need to get him out to exercise more often. Even in a 3x5 grid cc cage alone, he still is so fat.With him, he tends to hang out in the "extra large" one.
guinea pig woodland get away - Google Product Search
As other mentioned, "Chubes" are also a great secondary tunnel hidey, or you can use old oatmeal container, just pop out each end.