The other interesting midrash I mentioned before:
In Shemot 19:4, Hashem tells Moshe to tell the Jews why they should hearken to Him:
אַתֶּם רְאִיתֶם, אֲשֶׁר עָשִׂיתִי לְמִצְרָיִם; וָאֶשָּׂא אֶתְכֶם עַל-כַּנְפֵי נְשָׁרִים, וָאָבִא אֶתְכֶם אֵלָי.
"Ye have seen what I did unto the Egyptians, and how I bore you on eagles' wings, and brought you unto Myself."
Now, this most probably is not meant to be taken literally. That is, Hashem did not gather a bunch of eagles (as He did the quails) and cause the Jews to be taken out of Egypt on their wings. We read earlier how the Jews left Egypt. It is clearly metaphor. Rashi cites the midrash what the eagles' wings means - eagles place their young on their wings because the only danger comes from below, in the form of arrows, since they are the highest flying birds. So Hashem protected us with the Ananei HaKavod.
But what does וָאָבִא אֶתְכֶם אֵלָי mean? After all, Hashem is Omnipresent, so does one location contain His Presence more than others. Even if so, the first part is a metaphor, so perhaps this is a metaphor as well.
The mechilta cites various opinions. In the realm of metaphor, אֵלָי need not mean a location, but rather that He brought them to His service (worship), or to His Torah. In terms of location, that would be the current location, that is Har Sinai. And one very concise suggestion is the Bet HaBechira, thet is the Bet HaMikdash.
Tg Yonatan either expands on the suggestion or has access to the fuller version of the Midrash: Hashem gathered the Jews to Pelisium (a city in Lower Egypt that Tg Yonatan earlier associated with Ramses, so Ramses), and from there spirited them away to the Bet HaMikdash where they had the korban pesach. Then Hashem spirited them back to Pelisium and from there the Exodus proceeded as described.
Update, 2009: Here is the text of Targum Yonatan. And you can see it in a Mikraos Gedolos here.