Today I took a closer look why my rear wheel always gets out of true so easy.
Very close inspection revealed that my Alesa rim actually had cracks on the sidewall. Dammit, now I need to find a new rim so I can at least ride the event next Saturday.
I can't just buy a new wheel since I have an old 105 shimano 7 speed cassette with a 7 speed index tube shifter. I don't think there are any hubs out there anymore which would fit that cassette.
If I had the dough right now I'd replace my old bike with a 2007 Trek Modane 5.2 SL which the stores offer now for $1999 in a blow out sale.