SBS, I feel you, I really do! I am training for a TRI, too, and it sucks that the "big" clothes are several sizes too small. Believe it or not, I am eternally grateful to WalMart for carrying the Danskin fitness wear in XXL sizes that fit me (5'9" 235 lbs when I started, down to 227 after 10 weeks of mostly running x a week). It's not specialized Tri gear or bike gear, but it was at least stuff I wasn't embarassed to be seen in public in when I was doing Couch to 5K. I am also S-L-O-W (my 5K time is ~45 minutes) but it's all good. Don't you feel better? Stronger? I struggle with being annoyed that the weight isn't just pouring off (and I am watching intake, too) but it is what it is. At least I am healthier than I was a few weeks ago, and I hope to be even healthier by this time next year!

One other thought -- have you had D3 levels checked? I've done some reading that D3 level really effect weight, and a lot of docs don't check for it. I've heard anecdotal stories of people changing nothing other than taking 2000IU of D3 a day and the weight pouring off. Might be worth checking into.