I don't want to seem as though I'm trying to scare you away from the workshop, but I do want to make it clear how scary it is. If you think you're brave enough, go for it, but don't, for your own sake, go into it unprepared.
I took Intensive Greek (1 hr / a day x 5 days / week) myself last Spring, but the Summer Workshop is a lot more intense (3 hrs / a day x 5 days / week). Let me just advise you, that you cannot have any other major commitments this summer if you plan to succeed in this class. That means no job and no other classes, and you'd better stay on top of your homework too. But going to your class and doing your work will not get you through this class; you'll have to spend hours a day at home trying to understand the concepts (unless you've already studied Greek), and you won't get a break from that till the semester ends. If you haven't already studied Greek (or maybe even if you have...), then you should get in advance whatever book they are going to be using (maybe Mastronarde's?) and try to get the gist of as many of the major points as possible before the class begins. Also, I hate to say it, but if you haven't studied an inflected language, such as Latin or Greek before (at least to a beginner level), you will probably find it difficult to pass this course. Just in my intensive course which was only 1/3 as intensive as the summer version, the class was reduced from ~25 people at the beginning of the semester to just 5 at the end, and I heard only 2 of those five got better than a C.
Finally, as I expect you are aware, this class is a crash course, and you will have your work cut out for you if you plan on jumping into Greek the next semester. Assuming you retain all the grammar, your vocabulary will pretty pathetic (like mine was). This puts you at a disadvantage, but not a major one. To compensate, you can study as much as possible in the break between summer and fall semesters. If you're like me, you won't study over break and will end up using your dictionary a lot until you catch up in vocabulary to the rest of your class, which also works.
It looks like the class might be taught by Professor Kurke, whom I've never had as a language teacher but she is an excellent Classicist. I believe her specialties are lyric poetry and sexuality in Greece, but I doubt there will be time to talk much about Sappho in your class unfortunately.
Anyways, if I haven't been too grim feel free to contact me about courses in the future. I've taken most of the undergraduate classes and there are some instructors you should try to avoid, and some who are absolutely wonderful.
flebile nescio quid queritur lyra, flebile lingua murmurat exanimis, respondent flebile ripae