After singing along to "Still alive" and digging around the net for portal related stuff, the poster I ordered 2 weeks ago turned up on my chair when I got home. Valve released a limited edition of signed lithographs for Portal, TF2 and HL2 a few weeks ago and although I wanted the TF2 one, the picture just wasn't that interesting. The Portal one of GLaDOS seemed to work well and looked like it would be a good candidate for the collection.
It also came with a rather tacky authentication certificate, but the gloss print and the signing was worth it. For the record I got number 35 of 100, and seeing I went straight to the store after the announcement I guess they sold out rather quick. Went back to the site on Monday and they weren't even selling the ordinary lithographs anymore [Edit: now they are]. Should make for a good investment as one of the best moments in gaming.
For all the poo-pooing of Steam, it was a morning update message that alerted me to these being available. So all the pestering actually did get more money out of me. GG.
*Bonus cupie doll for picking up the name of the book holding the lithograph flat or finding the ghost in the machine.