I thought about past swaps last night, and would modify my belief that seeing all the swap lists merged is the only convenient way.
Often we learn individual's seed interests by just seeing their swap list. Sometimes that tells me I don't need to look again. Sometimes it tells me that I want to check their list every 2-3 days just in case they put out one more pkt of the kinds of seeds they're into.
Thus even if there are no complex search-and-filter bells-and-whistles, having the option to view just one member's swap list at a time has value.
Like most others, if I had to choose between seeing all swap lists merged, - OR - only seeing them one at a time, I'm glad I would have voted for all-at-once if I had gotten to this thread soon enough.
Howeeeever, right at the moment, we DO have both options with a little effort.
Almost everyone with a swap list is in the Beta swap, and probably most of what they have will also be Offered in this swap, especially if you make a special request.
Go to the Seed Swap Home page, and "Check out Everyone's Lists".
View one list at a time, and take notes on what you want to request (Who and What, and how it was alphabetized).
THEN go to the Beta Swap, scroll to that part of the list, find the What and Who, then click on it.