Forum Moderators: open
3) probably yes i think, a yahoo listing pretty much guarantees a google crawl, (same for dmoz but it can take a while for an Open Directory listing to happen)
also currently yahoo directory is not featured in the yahoo serps but it can change soon enough
2) If the directory is well organized and the categories are clean of garbage, it's a good sign. If the directory has some good additional content it's better. If the directory specializes in your market/theme it's a top.
3) Hmmm... depends. I'm in yahoo since years, placed on top of the yahoo internal search results and receive only about 300 referers a year in a mid popular (special interest) market. I don't submit any more pages to yahoo - *for me* it's not worth the money.
Regarding spidering with cgi forwarding, I have a feeling this is changing...I think I've seen it but I'm not an SEO and still learning here.
If you have a multi-lingual site, consider checking some of the European threads [webmasterworld.com]. Here you'll find directories in most countries worth submitting to. Good luck!